[lazarus] Updates

[Mattias Gaertner]

Hi,

Updates:

- source editor: ctrl+mouse now marks the word under the mouse as link
                 pressing ctrl+left mouse button works as find declaration
- fixed mouse double click recognition. This bug was the reason for some
  of the ignored single clicks
- form editing: click on OI will now focus the edit control
- fixed mouse capturing: (Designer Capturing Bug)
   - gtk-interface now sends mouse events directly to LCL
   - gtk-interface now updates the mouse capture handle on every mouse message
- gtk-interface: GetCoreChild returns now NIL as default
- fixed TSpeedButton.SetDown and Invalidate
- form editing: loading forms now creates all TComponentInterfaces
- form editing: fixed crash bug on deleting components
- form editing: fixed moving child components


Mattias