have basic functionality that prompts user on delete if descendants are greater than 3, also converted tabs to spaces

Change-Id: I42fd91c8a4c5866ed3f0273e14b680aca872bf1d
No longer show the “red bar” for stale sessions. Use Dialog Instead.

Display a Dialog box offering to reload the current session or end
it. Ending it replaces the window contents with a message saying the
session is ended.

Change-Id: I185089410ba46f67fc03aaa00eb54f532a679c18
Restore missing Sound component documentation

Change-Id: I617d009e4d0ac8ff1a42229c3bea52a3a4338d2c
Lockout Project and Screen Switching during I/O

Change-Id: I5bb05eb97bc10737abebf3b17014d81cef6a4ed9
Update Wording in the Multiple-Session Dialog Warning.

Make the dialog people see when they are logged in from more then one
location more user friendly. Also fix the forums link from the Help
menu to go directly to Google Groups instead of via the Website. This
is a work around for a Google problem (problems uploading images in
replys).

Change-Id: I66f6c3311fe5fc339d1ead2d11bc1498ef743e82
added code to update warning and error counts when blocks are removed

Change-Id: I28d858bfb09470cfa66ef2afe9228ee48e105b43
Permit People to Continue Past Double Session Warning.

Add a third option to the dialog box to permit people to continue
working even though there is a second account logged in. This will
permit classes that use one ID to continue to work. It should be OK as
long as two people do not work on the same project.

Change-Id: Iaaeb7afeea36cc0820cb12f75a282f6d8cccdec5
Names in the media box are truncated in the middle

We were truncating at the end of the file name, but that makes certain files
hard to distinguish (longNamedImage_1.png and longNamedImage_2.png).
The Finder in OSX truncates in the middle, and that was the suggested model.

Change-Id: I49bd25c81c522ee053d38d1290468668634a4dad