general: Remove periods from single sentences

This is done to align with the HIG rule about periods in single sentence
strings.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3280>

js/ui/shellEntry.js

@@ -173,7 +173,7 @@ class CapsLockWarning extends St.Label {
             ...params,
         });
 
-        this.text = _('Caps lock is on.');
+        this.text = _('Caps lock is on');
 
         this.clutter_text.ellipsize = Pango.EllipsizeMode.NONE;
         this.clutter_text.line_wrap = true;