docs(changelog): shortcut keys ignore Cmd, Ctrl and Alt chords (#1691)

changelog.d/1691-shortcuts-ignore-modifier-chords.md

@@ -0,0 +1,4 @@
+- Leave browser and system chords alone: a shortcut key held with Cmd, Ctrl or
+  Alt no longer runs its single-key shortcut. Copying with Cmd+C or Ctrl+C used
+  to turn the CCTV layer on and open the nearest camera, Cmd+F opened the layers
+  panel and Cmd+1 to 6 changed the visual style (asturksever, #1691).