Translate Python log messages + fix rhinopanel import in PROJECTS

- startup.py: all user-visible messages translated to English
- panel_base.py: icon/rendering log messages translated
- toolbar.py: display mode check messages translated
- Global: Panel registered/opened/listener-active across all modules
- Fix: elemente.py and other files with stale 'import rhinopanel'
  were missing from PROJECTS sync — now properly copied

rhino/treppe_grips.py

@@ -113,6 +113,6 @@ def install_handlers():
         conduit = _TreppeEndpointConduit()
         conduit.Enabled = True
         sc.sticky[_STICKY_CONDUIT] = conduit
-        print("[TREPPE_GRIPS] Endpoint-Conduit aktiv")
+        print("[TREPPE_GRIPS] Endpoint conduit active")
     except Exception as ex:
         print("[TREPPE_GRIPS] install:", ex)