Revert "Reduce the indicator arrow size for press-and-hold menus in…

Authored by ngraham on Apr 7 2019, 7:34 PM.

Description

Revert "Reduce the indicator arrow size for press-and-hold menus in QToolButtons"

This reverts commit 27bcd1be9c2c02067bf15c62fdb7f7e2ad394bd9.

The change in question has the potential to introduce regressions with
alternative icon themes, and in retrospect is not necessary for the
feature it was created in support of (https://phabricator.kde.org/D19311)