ttk::treeview: schedule redisplay when adding or removing tags [Bug 3603077].
ttk::treeview: schedule redisplay when adding or removing tags [Bug 3603077].
Restore failing tests to passing.
Backport various improvements from Tcl 8.5
merge-mark
Add some extra paths on Windows for finding tclConfig.sh, for mSys and Cygwin shell.
Add some extra paths on Windows for finding tclConfig.sh, for mSys and Cygwin shell. 
Improve some comments and quoting, no change in functionality.
Add some extra paths on Windows for finding tclConfig.sh, for mSys and Cygwin shell.
Improve some comments and quoting, no change in functionality.
merge trunk