Log Message:
tk: updated to 8.6.16

8.6.16

* Assignment of invalid symbolic constant
	 NotifyNormal (vogel)
* Segmentation fault with bogus resource value
	(X11) (emiliano)
* Improved the appearance of the Treeitem.indicator element
* macOS Sequoia: warning: 'setShowsResizeIndicator:'
	is deprecated (vogel)
* with half-dead argument can cause
	hangup or even crash (vogel)
* SIGABRT from Tk_DeleteErrorHandler() (vogel)
* Workaround for X11 build with
	XQuartz: crash in XLoadQueryFont (vogel)
* Tk intialization overwrites thread specific data

8.6.15

* Invoke binding scripts for events with detail field
	NotifyInferior (leunissen, vogel)
	*** POTENTIAL INCOMPATIBILITY ***
* with xvfb (vogel)
* clearingdata
* Fix appearence of arrows in ttk widgets
* Add keycodes ISO_Group_Shift and dead_hamza (nijtmans)
* Improve look of the classic theme (gavilan)
* Improved focus ring for ttk (nemethi)
* now point aware (vogel)
* Fix default font detection for high DPI (vogel,nemethi)
* covering down arrow (vogel,gavilan)
* Fix performance of image copy (vogel)
* Fix image read with -from option for gif/png
* Throw error message on corrupt gif file
* fix segfault on menubutton destroy (MS-Win only)
* Improve focus ring for ttk widgets
* painting/clipping/scrolling of last
	item (bron,nemethi,werner)