QShortcut: fix build under QT_NO_CONTEXTLESS_CONNECT

QShortcut has a constructor that takes a _parent_ object and a
function to invoke, and it will internally connect its activated()
signal to that function. This connection will not provide a
context object (the parent is not used to this purpose).

Given it's not clear what the context should be if any (the parent?
`this`?), I'm not at ease at just supplying "something" as the context.
Instead, hide the constructor if we're under QT_NO_CONTEXTLESS_CONNECT.
There's another constructor where the caller can supply a context.

Change-Id: I21befcc86eeb07e65eadee1222757ecc5bab1d2c
Pick-to: 6.9 6.8
Reviewed-by: Richard Moe Gustavsen <[email protected]>
Reviewed-by: Volker Hilsheimer <[email protected]>

0 files changed, 0 insertions, 0 deletions