[Lazarus] Scaling of menuitem icons

[Ondrej Pokorny]

On 19.10.2018 11:43, zeljko wrote:
> QProxyStyle can return any size for PM_SmallIconSize, but in that case 
> we should know what's the current size of "normal" icons in LCL.

The current size of "normal" icons in LCL is perfectly known, as well as 
the size of any menu icon in LCL. Call the TMenuItem.GetIconSize 
function to get it.

Ondrej