They now live under trezor.ui.components.tt. Later
trezor.ui.components.t1 will be added and application code will be
rewritten to not use them directly in order to work on both TT and T1.
this makes sense, really: close_others() requests UI exclusivity, and
that is something that generally happens at the same places we emit a
ButtonRequest
Apart from making the code more correct for its users in
apps.common.confirm and elsewhere, this fixes a problem where the
confirm_signal would be scheduled before the dialog is rendered.
By making sure that handle_rendering is scheduled (i.e., listed in
create_tasks) before confirm_signal, we can be sure to render at least
once and thus appear in the UI test results.
