Scrollable suites for displays

[aberges-SLAC]

Currently, when you call typhos --scrollable true you get vertical scroll bars in you display widgets, but not your suite:

This is kind of awkward for vertical displays (or just in general when there are many widgets in your window, as we often have in the hutches).

It'd be nice to have the suite instead have a scrollbar which is tied to the layout. Very naive changes to

typhos/typhos/suite.py

Line 282 in ca90f51

self._content_frame = QtWidgets.QFrame(self)

lead me to:

 self._scroll_area = QtWidgets.QScrollArea()
        self._scroll_area.setWidgetResizable(True)

        # Content frame layout: configurable
        # Defaults to [content] [content] [content] ... in one line
        if content_layout is None:
            content_layout = QtWidgets.QHBoxLayout()
        self._content_frame.setLayout(content_layout)

        self._scroll_area.setWidget(self._content_frame)
        self._scroll_area.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarPolicy.ScrollBarAlwaysOn)

        # Horizontal box layout: [PopBar] [Content Frame]
        layout = QtWidgets.QHBoxLayout()
        self.setLayout(layout)
        layout.setSpacing(1)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(self._bar)
        layout.addWidget(self._scroll_area)

Which gives me the desired effect:

But we probably want to do this more intelligently and enforce some orthogonality so we don't have a bunch of parallel scroll bars (cough confluence cough)