Add new search pref: 'Use the current file's directory for Find in
Files' (#1930435).
Add PrefEntry struct which is used for an array containing widget
names to lookup; currently only used for 3 search-related
GtkToggleButton prefs.
Add SettingEntry struct which is used for an array containing keyfile
key and group information; currently only used for 3 search-related
gboolean settings.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@2724 ea778897-0a13-0410-b9d1-a72fbfd435f5