Please add horizontal scroll to stack view

[pjcreath]

What is the feature you'd like to have?
I'd like to be able to scroll horizontally in the stack view.

Is your feature request related to a problem?
Frequently, variable or field names run off the side of the pane. The only way I can read them is to temporarily resize the pane, which is a pain (pun intended).

Are any alternative solutions acceptable?
Resizing the pane lets me see the full text, but that's really just a workaround.

Additional Information:
n/a

[fuzyll]

Added this as a sub-issue of #3051.