[patch] Selection stats in statusbar

[Jürgen Spitzmüller]

Am Donnerstag, dem 18.08.2022 um 09:55 +0200 schrieb Jürgen
Spitzmüller:
> You need a more suitable signal that only emits when text is edited
> or loaded.

The attached seems to work basically. But I haven't check for all cases
(I am dure there are cases I missed) and didn't push hard for
performance (currently the timer is commented out; if this is too
expensive, processes should be managed via QFuture).

-- 
Jürgen
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