201709 GT Manager UI note, tables

Initially tried to prototype a single UI/Mgr for GT that would handle both 
i) movie-management (add/rm) as well as suggestions/browsing/labeling. 
Started hacking JIDE/Yair treeTable. However, there is a need for 
"empty grouping rows" for movies that have been added, but do not have 
suggested frames yet. Basically, this is not supported by treeTable -- 
treeTable is designed for a single table that can be grouped by one or more 
cols/groupvars. The notion of an empty grouping row is nonsensical. Hacking 
JIDE seems pretty difficult/time-intensive due to opacity etc.

In addition to high dev cost for a custom treeTable, such a table would 
prob not be able to handle trxfiles well (too much data), and definitely 
not multiview or worse multiview+trx.

For now, split up the functionality into two UIs. MovieManager exists and 
exists specifically to  manage movies/trx. GTMgr will handle 
suggestions/nav and computing performance. This is probably better anyway.