Better exception handling

.bin/Scripts/ddrescue-tui-menu

@@ -38,12 +38,21 @@ if __name__ == '__main__':
             if not re.search(r'(^$|help|-h|\?)', run_mode, re.IGNORECASE):
                 print_error('Invalid mode.')
             show_usage(script_name)
-        exit_script()
         
         # Done
         print_standard('\nDone.')
         pause("Press Enter to exit...")
         exit_script()
+    except GenericAbort as ga:
+        if str(ga):
+            print_warning(str(ga))
+        abort()
+    except GenericError as ge:
+        if str(ge):
+            print_error(str(ge))
+        else:
+            print_error('Generic Error?')
+        abort()
     except SystemExit:
         pass
     except: