Add shortcut key for checking the "Viewed" checkbox in Merge Request changes, when "Show one file at a time" is enabled
Proposal
Please add keyboard shortcut key for checking "Viewed" checkbox in Merge Request changes. I think it should be enabled only when "Show one file at a time" is enabled, because it doesn't make sense when multiple files are shown. In that case which one should be checked? That's why.
Also #341138 is blocking this issue, because when that checkbox is focused, it disables almost all shortcuts keys except 'Tab' (as I've found out)