3dffdab1ad
When we started to only show a single caption at a time, we allowed title captions to be wider than their corresponding window preview. But while overlapping neighboring previews is fine, we shouldn't allow the captions to leak outside the workspace area itself and overlap unrelated elements like workspace switcher or dash. This partly reverts commit b3b30f239d. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/214 (cherry picked from commit 6099e92df59c29f1f3f9ecd49af8caeecd787bfa)