Prevent multiple reloads when saving

Avoid potential issues with Mac libedit crashes (hopefully)

Fixes https://gitlab.com/kicad/code/kicad/-/issues/14865

eeschema/sch_base_frame.h

@@ -241,6 +241,18 @@ public:
      */
     void OnSymChangeDebounceTimer( wxTimerEvent& aEvent );
 
+    /**
+     * Set the modification time of the symbol library table file.
+     *
+     * This is used to detect changes to the symbol library table file.
+     *
+     * @param aTime is the modification time of the symbol library table file.
+     */
+    void SetSymModificationTime( const wxDateTime& aTime )
+    {
+        m_watcherLastModified = aTime;
+    }
+
 protected:
     void handleActivateEvent( wxActivateEvent& aEvent ) override;
 

eeschema/symbol_editor/symbol_editor.cpp

@@ -1130,6 +1130,10 @@ bool SYMBOL_EDIT_FRAME::saveLibrary( const wxString& aLibrary, bool aNewFile )
     if( !aNewFile )
     {
         m_libMgr->ClearLibraryModified( aLibrary );
+
+        // Update the library modification time so that we don't reload based on the watcher
+        if( aLibrary == getTargetLib() )
+            SetSymModificationTime( fn.GetModificationTime() );
     }
     else
     {