editor and font changes
- changed the enButton default texture, as well as created a new constructor which accepts a custom texture filename
- added a “new map” button to the editor screen which clears out the current map (and increases g_saveLevelCount)
- modified the test mode for trying maps to include a “caution” border, and the ability to go back to the editor by pressing escape
- added the ability to change the font size of any label on the fly (as opposed to setting the values in cvars.ini)
- removed the attribute "sideWalls" from the XML level structure
- added a drawBorder function to enActor
- on the intro page, added the ability to select options with the mouse
- in the editor, the selected entity now stands out more noticably
- the console command updateIni now accepts as a parameter a console variable name, which allows only that updated console variable value to be saved (all other console variables are saved using their originally loaded values)
