tdf#125609c10 vcl/button: enforce only one radio selected on init

This patch does not solve the main LO 6.2 problem in bug 125609,
but fixes the related problem from comments 10/11.

This patch fixes two different scenarios:
1.) Sometimes buttons could fall through the other safety nets and
have multiple radio buttons selected in a single group at display time.
Since ImplInitStyle can be called multiple times for the same
button, ensure that once everything is imported (IsRadioCheckEnabled)
that any calls to this double-check that only one button is enabled.

First come, first served if by programmer error multiple are marked as
IsChecked in the same group. This problem existed pre-LO 6.2,
so it had nothing to do with tabstops specifically.

2.) This patch specifically fixes the 6.2 regression with the
Grammalecte extension Graphic Options dialog box. In this case
Dialog::GrabFocusToFirstControl ended up being treated as a "click"
on a tabstopped, unchecked radio, because setting the state
never called the SetState/Checked function, but only the Init,
and so the uncheckAllOther function never removed any tabstops.

Change-Id: I98272d6c81cf582a15c2e6bf04e6ed60da1d9c71
Reviewed-on: https://gerrit.libreoffice.org/74108
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>

0 files changed, 0 insertions, 0 deletions