* Split out application specific command IDs to prevent unnecessary rebuilding.
* Eliminate duplicate menu and tool bar command IDs.
* Split component library editor and viewer definitions to separate header files.
* More component library and document file merge code.
* A bunch of minor string readability and consistency fixes.
* Add default OS program install path(s) to search path list as fail safe.
* Remove unnecessary wxGetApp calls in WinEDA_App class methods.
* Remove non-standard message panel font and changed background to system menu color.
* Remove italic fonts from menus.
* Remove non-standard font in Kicad app project tree.
* Remove font selection dialog menu items from apps for removed fonts.
* Remove all global variables and settings associated with the removed fonts.
* Fixed PCBNew export and import library file dialog response tests from wxCANCEL to wxID_CANCEL.
