- fix app crash for the case that there are no translation files

- fixed some forgotten strings to be prepared for internationalization in ToolCalculators
- fixed Tools menu no longer working due of changes
- added some test translation for the ToolCalculators (in Romanian)
- fixed bug in ToolCutOut where for each tool invocation the signals were reconnected

camlib.py

@@ -72,8 +72,11 @@ log.addHandler(handler)
 
 import gettext
 import FlatCAMTranslation as fcTranslate
-fcTranslate.apply_language('camlib')
 
+fcTranslate.apply_language('camlib')
+import builtins
+if '_' not in builtins.__dict__:
+    _ = gettext.gettext
 
 class ParseError(Exception):
     pass