fix(developer): Ctrl key to select key was conflicting with shortcuts

Fixes #7425.

In the layout editor, the "Select Key" dialog was being shown sometimes
when using shortcuts such as Ctrl+V. The reason this happened was that
the shortcut handler in Delphi was capturing the keydown of the V key,
so the Ctrl event handler never saw it. Then, if you pressed Ctrl+V, and
released the Ctrl key before releasing the V key (which often happens
when you press a shortcut rapidly), the Ctrl event handler would receive
notification of the Ctrl key release and trigger the "Select Key"
dialog.

This fix shifts the Ctrl key event handler out of the keyboard editor
and into the top-level application events handler -- this is the best
place where we can preview key events before they are passed to the
shortcut handler and controls for processing.

This necessitated adding a general `ControlKeyPressedAndReleased` event
function to the TIKE editor base class. This is currently only used by
`UfrmKeymanWizard` and `UfrmOSKEditor`.

I noted that the OSK editor did not currently support the Ctrl key
event to select a new key. As a part of this fix, I added support for
this, to bring it into line with the Layout Editor and the Touch Layout
Editor.