Silence IsWritable warning message

Fixes https://gitlab.com/kicad/code/kicad/-/issues/9656

common/eda_base_frame.cpp

@@ -1042,7 +1042,7 @@ void EDA_BASE_FRAME::OnPreferences( wxCommandEvent& event )
 }
 
 
-bool EDA_BASE_FRAME::IsWritable( const wxFileName& aFileName )
+bool EDA_BASE_FRAME::IsWritable( const wxFileName& aFileName, bool aVerbose )
 {
     wxString msg;
     wxFileName fn = aFileName;
@@ -1078,7 +1078,9 @@ bool EDA_BASE_FRAME::IsWritable( const wxFileName& aFileName )
 
     if( !msg.IsEmpty() )
     {
-        wxMessageBox( msg );
+        if( aVerbose )
+            wxMessageBox( msg );
+
         return false;
     }
 

eeschema/eeschema_config.cpp

@@ -148,7 +148,7 @@ void SCH_EDIT_FRAME::SaveProjectSettings()
 
     fn.SetExt( ProjectFileExtension );
 
-    if( !fn.HasName() || !IsWritable( fn ) )
+    if( !fn.HasName() || !IsWritable( fn, false ) )
         return;
 
     RecordERCExclusions();

include/eda_base_frame.h

@@ -462,9 +462,10 @@ public:
      * @note The file name path must be set or an assertion will be raised on debug builds and
      *       return false on release builds.
      * @param aFileName The full path and/or file name of the file to test.
+     * @param aVerbose If true will show an error dialog if the file is not writable
      * @return False if \a aFileName cannot be written.
      */
-    bool IsWritable( const wxFileName& aFileName );
+    bool IsWritable( const wxFileName& aFileName, bool aVerbose = true );
 
     /**
      * Check if an auto save file exists for \a aFileName and takes the appropriate action