determine when all prefs have been written to disk
code cleanup
more code cleanup
wait for prefs startup
grunt writes build timestamp, read into about view
cleaned up a debug flag
changes for code review
jsdoc fixes
Merge pull request #8033 from HighwayChile/issue-7716-2

about screen shows build timestamp if running from /dist
need to keep waiting for last _saveInProgress
Updated by ALF automation.
Merge pull request #8053 from adobe/alf_localization

ALF Automation
Merge pull request #7930 from adobe/randy/issue-7683

Determine when all prefs have been written to disk