impr: Make in variable values persistent between parser runs again

lib/external/pattern_language

@@ -1 +1 @@
-Subproject commit c53fbdda2b99e3f5ea8747aa7ddf024a7cf0f044
+Subproject commit 2f9e11d1e66d5177a2a62883a6429b1cbf9437ba

plugins/builtin/source/content/views/view_pattern_editor.cpp

@@ -1551,6 +1551,8 @@ namespace hex::plugin::builtin {
                     }
                 }
             }
+        } else {
+            patternVariables = std::move(oldPatternVariables);
         }
 
         m_runningParsers -= 1;