thg version: 2.3.0. OS: Win7 x64. My hgrc file contains ciexclude option with long value - about ~500 characters, thg client show this value in Selected Options. If I had try to expand or resize new/changed files pane - it would collapse to the left (hided). See attached screenshots. Same bug with Repository Registry tool window. Only workaround I've found - remove or reduce size of ciexclude option in hgrc file.
Issue #1694 duplicate