hyprland/language: Fix commas in keyboard names and layouts #3406
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Commit 29917fb ("Fix hyprland/language events not working with keyboard names with commas in them (#3224)") attempted to fix the problem, but introduced the opposite problem.
The event data from Hyprland is "activelayout>>KEYBOARDNAME,LAYOUTNAME", but both KEYBOARDNAME and LAYOUTNAME may contain embedded commas, so the simple
find_first_of(',')
orfind_last_of(',')
solutions will break things for different users.This patch attempts to solve the problem by trying all combinations of keyboardname and layoutname until one makes sense, either by matching the keyboard name to the user-configured device name, or by matching the layoutname to the list of valid layouts.