[Lazarus] Detect that component selected in OI.

[Ondrej Pokorny]

On 22.05.2016 8:50, Ondrej Pokorny wrote:
> IMO you can suggest a custom designing message that will handle it 
> without hard-coding it into the IDE. Because e.g. the TNotebook page 
> change doesn't work.

No need. I added CM_OBJECTINSPECTORSELECT in r52338.

Ondrej