Fix remaining German log messages: Panel registered, Listener active, sync all files to PROJECTS

- Fix sed $-anchor issue: 'Panel registriert' now replaced globally
- Translate: Listener aktiv, Select-Handler, Closing-Hook, Doppelklick-Handler
- Translate SPLASH messages: gesetzt/angewendet
- Translate ALIAS-LOADER, WELCOME, ELEMENTE migration messages
- Full rsync of all rhino/*.py to PROJECTS (previously partial sync missed schnitte.py, wand_grips.py, treppe_grips.py, text_editor.py, welcome.py etc.)

rhino/panel_base.py

@@ -874,7 +874,7 @@ def register_and_open(mode, caption, guid_str, bridge_factory, icon_spec=None, m
                     try:
                         panel.MinimumSize = drawing.Size(int(min_size[0]), int(min_size[1]))
                     except Exception as ex:
-                        print("[{}] MinimumSize konnte nicht gesetzt werden: {}".format(mode.upper(), ex))
+                        print("[{}] MinimumSize konnte nicht set werden: {}".format(mode.upper(), ex))
                     # Auf einigen Eto-Versionen gibt es zusaetzlich Size/ClientSize
                     for attr in ("Size", "ClientSize"):
                         try:
@@ -925,7 +925,7 @@ def register_and_open(mode, caption, guid_str, bridge_factory, icon_spec=None, m
                 return
             sc.sticky[sticky_reg]  = True
             sc.sticky[sticky_guid] = System.Guid(guid_str)
-            print("[{}] Panel registriert".format(mode.upper()))
+            print("[{}] Panel registered".format(mode.upper()))
         except Exception as ex:
             print("[{}] Registrierung fehlgeschlagen: {}".format(mode.upper(), ex))
             return