VMUI.vi can terminate itself.

This change will make VMUI check the validity of VariableManager
reference and subpanel reference every 10 seconds.  If the reference is
no longer valid, VMUI.vi will detach and stop itself.
Fix wrong termination code

change ok button to false at termination
Address issue #35

Make change to both variable and sequence index.
Revert "Address issue #35"

This reverts commit 1e6147d7b4eccb45ed800169cdba4cc1a27c2576.
Address issue #35

Create GlobalReservedNames.vi
Both VariableCheck.vi and SequenceIndexCheck.vi will check input name
against ReservedNames list in GlobalReservedNames.vi
Close VI reference at the end of asynchronous call
VMUI self terminate test in sandbox
Do not destroy update event

Sometimes, update event is destroyed before "Stop UI" event stops the
VMUI window.
VMUI viewer self terminate

Copy self terminate code from VMUI to VMUI_Viewer
Merge remote-tracking branch 'origin/master' into Line-Preview