[Lazarus] IDE Messages window uses much CPU when building a project on Win32

[cobines]

I posted a patch for the excessive Begin/EndUpdate.
http://bugs.freepascal.org/view.php?id=21600

>From my tests disabling displaying progress has almost no impact on
CPU usage, so I'm not doing anything with it.

However I found that the quick fix icons that are updated from timer
or OnIdle while building amount to half of CPU usage, so I would like
to add an option to disable them. I have only found option to disable
the note/hint/warning icons.
Is it enough to only disable displaying the icons or would I need to
disable some functionality as well, like the "Hide message via
directive" menu? I don't use this feature so I don't know if icons are
indispensable for it to work.

--
cobines