The GTK3 version of GtkLabel provides what GeanyWrapLabel is for given
the appropriate settings are set, so no need to our own widget -- that
would require being updated to support GTK3 anyway.

Map the various horizontal and vertical deprecated constructors
to their GtkOrientation-based equivalents on GTK3 to prevent most
deprecation warnings.

Use the GtkComboBoxText API and the GtkComboBoxEntry replacement API
and map those to the old equivalents if not available.

This changes the type exposed by ui_combo_box_add_to_history() from
GtkComboBoxEntry to either GtkComboBox (under GTK2) or GtkComboBoxText
(under GTK3).  This should not be too much of an issue since
GtkComboBoxEntry and GtkComboBoxtext are subclasses of GtkComboBox,
but this will still emit warnings when when the calling code passes
a GtkComboBoxEntry pointer to ui_combo_box_add_to_history().

However, this requires the calling code to use the same mapping as we
do (GtkComboBoxText = GtkComboBox on GTK2, even on 2.24), or things
will blow and it'll be hard to understand why.  This wouldn't be an
issue if the calling code includes our gtkcompat.h header everywhere
it deals with combo boxes, which will be the case if it includes the
Geany headers everywhere but probably won't otherwise.  Oh dear.

A possible kind of workaround may be for ui_combo_box_add_to_history()
to do type-checking on its argument and use the actually correct API
for that type.

GtkDialog separators sere deprecated on GTK 2.22 and remove on 3.0,
so define them to dummy values on GTK3.

We don't get rid of them altogether because GTK 2.16 we depend on
probably has separators enabled by default and we want to remove them.

Since many accessor are new in GTK versions we don't depend on, add
a header that defines them to the direct access if they aren't
available.

This makes the "wordchars" setting from filetypes.common and each
specific filetype override filetype.common's "whitespace_chars"
setting, rather than it overriding filetype-specific "wordchars".

This makes the it easy to chose filetype-specific "wordchars", where
before user had not only to update this setting, but also the
filetype.common "whitespace_chars" setting if it listed one or more of
the new characters for the change to actually have an effect -- and
changing "whitespace_chars" for every filetype.

Closes #3429368.

Closes #3574723.

Closes #2130612.

Closes #3167355.

If we generated methods, properties or class children tags for a
variable, generate a class tag for the variable itself so the children
aren't orphaned.

If a property value had more than one token, the parser choked on it
and failed to parse further properties of the object.  Fix that by
properly skipping the property's value.  If that value is a sub-object,
parse it recursively.

Closes #3470609.

Closes #3036476.

This fixes parsing of the following unterminated statements:

	if () {
		foo = 42
	}

	if () {
		foo = new Object()
	}

	if () {
		foo = ({a:1,b:2})
	}

If an `if` haven't had braces, the code used to check itself for an
`else` after it, eating the next token if it wasn't actually an `else`.

So, drop the check for the else altogether since parseLine() handles
`else`s by calling parseIf() anyway.

This fixes constructs like:

	if (foo)
		bar();
	function baz() {
		// ...
	}

Closes #3568542.

This makes `Foo.bar = function()` properly report a function tag "bar"
with scope "Foo" rather than a function tag "Foo.bar" with no scope.

Part of #3570192.

There is no need to set the token position information in the loop
searching for the initial token character, simply do that when we
finally found the token start.

The external declaration of "File" in read.h (defined in read.c) was
improperly tagged as "const" for it not to be modifiable outside of
read.c.  Although it is good to protect this global variable against
improper modification, the use of "const" here makes it perfectly valid
for the compiler to assume that the fields in this structure never
changes during runtime, thus allowing it to do optimizations on this
assumption.  However, this assumption is wrong because this structure
actually gets modified by many read.c's functions, and thus possibly
lead to improper and unexpected behavior if the compiler sees a window
for optimizing fields access.

Moreover, protecting "File" as it was with the "const" type qualifier
required a hack to be able to include read.h in read.c since "const"
and non-"const" declarations conflicts.

Actually, at least the JavaScript parser did suffer of the issue,
because it calls getSourceLineNumber() macro (expanding to a direct
"File" member access) several times in one single function, making it
easy for the compilers to cache the value as an optimization.  Both GCC
and CLang showed this behavior with optimization enabled.  As a result,
the line numbers of JavaScript tags were often incorrect.

GCC 4.7.1 gives a incompatible pointer warning because gtk_adjustment_new
returns a GObject* not a GtkAdjustment* (new compiler default).

Multiline comments did not work at end of file because there is no
style there so also check if at end of file as well as style.
Closes #3026691

The SIGTERM handler called the standard exit callback which uses
functions that are illegal in signal handlers.  Commented out as
a prelude to full removal if no use case can be made.

Geany performance suffered with a lot of error underlining visible.
Matthew Brush developed an improved implementation that was accepted
into Scintilla, this selects that implementation.

Instead of adding the scope to the tag name, properly add it as the
tag's scope.

Closes #3570192.

Don't only match the current function as the current scope, but also
classes, namespaces and others containers.

Closes #1996778.

Finding the current function now better handles the case the current
line is after a function but outside its scope, and many other issues
the scope reporting had.