Allow horizontal scroll bar in windows' sidebars, including Style dialogs and Master Palette
A few windows in MuseScore have a left-hand sidebar with options to choose what displays on the right. However, the size of that left-hand sidebar is generally locked. (One of the few exceptions is the Instruments dialog).
This has been shown to be problematic in at least one case:
It seems that what's needed here is a splitter, with which the user can resize the sidebar enough to see the full text. See http://doc.qt.io/qt-4.8/qsplitter.html#details.