Use Ctrl+Shift+Space always for showing calltips because Alt+Space is used often by window managers (not only under Windows).
Added keybinding for inserting alternative whitespace characters.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1422 ea778897-0a13-0410-b9d1-a72fbfd435f5