hgview #20597 allow overriding 'file too big' in the ui [validation pending]

When navigating mercurials repository, the diffs on the file 'mercurial/commands.py' is shown as 'file too big'. This should not be (even though commands.py has around 3800 lines). The same applies for some big XML files.

It would be great to be able to override the 'file too big' thing on a file or changeset basis to see the diff anyway. E.g. using the context menu (right-click) or a button?

done in1.6.0
load left0.000
closed by#a1a6e6e07459 [tui,qt] Allow overriding ``maxfilesize`` config value in the UIs (closes #20597)