Created attachment 8862061 [details] Screenshot_20170426_185911.png User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20170419190606 Steps to reproduce: Use the 3-pane-window. Increase the size of the middle column towards the right, decreasing the size of the rightmost column. Actual results: The "<-| Answer" button is cut off and hidden partially or completely, depending on the size of the rightmost column. If the window is small enough, other buttons get hidden as well. Also see the attached screenshot, mouse cursor is right below the button that is cut off. Expected results: Toolkits such as Qt completely remove buttons from horizontal toolbars if they don't fit into the line, then makes them available via a single button, that opens a a list of the hidden options vertically, or show another line below the first line. Firefox does this excellently as well, if you make the Firefox Window very small, a ">>" button appears in the toolbar.
I change this bug to enhancement.
Severity: normal → enhancement
Status: UNCONFIRMED → NEW
Ever confirmed: true
Summary: answer button gets cut off from the left and hidden → Add a overflow widget when headerPane button overflow
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