Set preferred and minimum width for frame title in sidebar
Set preferred and minimum width for frame title in sidebar

also set overflow to elipsis to make it look better in the case of very
long page titles

Bug: 1290218
Change-Id: I98815979884b6287f6d5516f90ec0cb654446e1d
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3414146
Reviewed-by: Tim Van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>
Commit-Queue: Ted (Chromium) Meyer <49f16de1701e9d27e09eb331529eeca82ecbab45@chromium.org>

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