Pcbnew, Properties panel: mask 2 properties irrelevant for pcb fields.

Color and Hyperlink properties have no meaning for pcb fields, but if set
created unreadable .kicad_pcb files.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/18368

pcbnew/pcb_field.cpp

@@ -273,5 +273,9 @@ static struct PCB_FIELD_DESC
 
         propMgr.OverrideAvailability( TYPE_HASH( PCB_FIELD ), TYPE_HASH( EDA_TEXT ), _HKI( "Text" ),
                                       isNotFootprintFootprint );
+
+        // These properties, inherited from EDA_TEXT, have no sense for the board editor
+        propMgr.Mask( TYPE_HASH( PCB_FIELD ), TYPE_HASH( EDA_TEXT ), _HKI( "Hyperlink" ) );
+        propMgr.Mask( TYPE_HASH( PCB_FIELD ), TYPE_HASH( EDA_TEXT ), _HKI( "Color" ) );
     }
 } _PCB_FIELD_DESC;