Fix for plotchart testsuite, added proper Tcl version check.
Fixed another improper check, and removed redundant check in package index.
Activate all the Tk specific tests.
Get latest plotchart fixes.
[Bug 3458158, 3607261]: Fixed broken bindings of "widget::calendar"
which in turn broke "widget::dateentry".  Bumped calendar to 1.0.1,
dateentry to 0.96.
Get widget fixes (dateentry & calendar) into release.