Details:
- added a bunch of database-action related icon buttons
- operator atts and plot atts menus are now in the main menu
- all the other main plot/operator actions are now icon buttons
- vcr control button icons were *tiny* in virtually every style
- set default main window width to 350 instead of 400 since
  we make better use of horizontal space now
- hide the "File -> Select Files" menu item in non-selected-files mode
- unify mac and unix/windows menu placement
- enabled half a dozen operators by default (adding a CMakeLists file for Edge)



git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@9943 18c085ea-50e0-402c-830e-de6fd14e8384