QCommonStyle: use RSIP_OnMouseClick for SH_RequestSoftwareInputPanel

Both Android and iOS needs the style to use RSIP_OnMouseClick (and
qwindowscestyle and qwindowsmobilstyle as well, it seems) so set it
as default (instead of expanding the #if test even more).

Change-Id: I93a78e11031b506c2cb80f30f1946fe25f7945a9
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>