Fix Physics Plugin Search in Extra Projects (#6880)

* fix physics plugin search in extra projects

* update changelog

Author: CoolSpy3

docs/reference/changelog-r2025.md

@@ -19,6 +19,7 @@
     - Fixed a bug causing supervisors to occasionally read stale field values after the simulation was reset ([#6758](https://github.com/cyberbotics/webots/pull/6758)).
     - Fixed a bug causing Webots to occasionally crash when unloading a world ([#6857](https://github.com/cyberbotics/webots/pull/6857)).
     - Fixed a crash occurring when Python was not found on Windows ([#6870](https://github.com/cyberbotics/webots/pull/6870)).
+    - Fixed detection of physics plugins in extra projects ([#6880](https://github.com/cyberbotics/webots/pull/6880)).
     - Fixed `addForceWithOffset` and `addTorque` doing the same thing as `addForce` in Python ([#6881](https://github.com/cyberbotics/webots/pull/6881)).
 
 ## Webots R2025a

src/webots/scene_tree/WbExtendedStringEditor.cpp

@@ -131,7 +131,7 @@ const QStringList &WbExtendedStringEditor::defaultPhysicsPluginsEntryList() cons
     QDir resourcesDir(WbStandardPaths::resourcesPhysicsPluginsPath());
     mDefaultPhysicsPluginsEntryList << defaultDir.entryList(FILTERS) << resourcesDir.entryList(FILTERS);
     foreach (const WbProject *extraProject, *WbProject::extraProjects())
-      mDefaultControllersEntryList << QDir(extraProject->physicsPluginsPath()).entryList(FILTERS);
+      mDefaultPhysicsPluginsEntryList << QDir(extraProject->physicsPluginsPath()).entryList(FILTERS);
     firstCall = false;
   }
   return mDefaultPhysicsPluginsEntryList;