This diff is only touches the editing part of the ConfigEditor.
- Pass config values as the respecting types: int, bool and string. This simplifies config editing in some extent - no more hardcoded options names, that requires quotes around values in gtkrc-2.0 and xsettingsd.conf. Also it simplifies working with GSettings API and helps to transform KDE config options to GTK config options.
- Remove redundant \\n symbols, when adding new option in gtkrc-2.0 and xsettingsd.conf