Loading OSD tab is so slow

[error414]

Loading OSD tab is incredibly slow. It's caused by calling updateOSDCustomElementsDisplay.

Loading custom OSD elements fire "change" event for each filled input in custom element block. So if four custom elements are used. then it means 4 * 4 = 16, 16 calling of updateOSDCustomElementsDisplay, in updateOSDCustomElementsDisplay is called OSD.GUI.updatePreviews(); what is incredibly slow if it's called in the loop.

So for future be careful about calling OSD.GUI.updatePreviews();.

[MrD-RC]

Looks like it would be good if change events could be blocked until the page has finished loading. Then call the update previews once the page has finished loading.