[TCLCORE] TIP 719: ready for vote "new states to customize ttk::treeview and ttk::notebook widget images in dependency of the state of items"

[Harald O. <har...@el...>]

Dear Tk team,
TIP 719:
https://core.tcl-lang.org/tips/doc/trunk/tip/719.md
was seen as ready in the bi-weekly telco.

Purpose:
- new tk states to customize ttk::treeview and ttk::notebook images.
In Tk 8.6, the states user1/2 were used are abused. This was removed in 
Tk9.0, and now comes back in an extended way to allow:

ttk::style element create Treeitem.indicator \
               image [list $image_for_closed \
                   open $image_for_open \
                   leaf $image_for_no_children \
               ]

So, this is a kind request for comments.
I would specially appreciate a review by Csaba and Francois.

If there are no issues, expect a vote on:
12th of May for one week.
So, that it may be in Tk9.1a0.

Take care,
Harald