Fixes for R2014b of MATLAB/Simulink, including:
* No longer prompting for connection information in isDirSandboxForThisAdapter
* Fixed up commit logic, so it no longer uses the current changelist
* Added back logic to walk the directory tree to find a .p4config file, rather than needing one in the sandbox directory
* Added new buttons for re-connecting to p4d, and editing .p4config
* Investigated conflict issues - fixed some, better logic coming
* Removed .p4ignore generation - wrong spot for it
Transferred from p4://perforce.perforce.com:1666@976888