Show "end of life" notice in header bar

[m-kuhn]

References #3452

There's a lot of hardcoding in there.
It will need some sphinx etc. pro to make it translatable et al.

Goal:

Ticket(s): #

• Porting to several other doc versions which are EOL is required

[SrNetoChan]

Not sure there's a proper/better sphinx way of doing it. Besides, no more changes are expected in this branch so, some degree of hardcoding is allowed. :-)

[SrNetoChan]

I think you need to rebase this to get the latest changes on this branch to fix the building.

[m-kuhn]

I think you need to rebase this to get the latest changes on this branch to fix the building.

To me it looks like the branch is just too old to build (last rebuild was 2 years ago), I had to do some quirks to get it to build locally too

[m-kuhn]

Not sure there's a proper/better sphinx way of doing it. Besides, no more changes are expected in this branch so, some degree of hardcoding is allowed. :-)

Somehow yes (it's definitely better than nothing!), don't count on me to do much more here.
But eventually this will be on master as well, controlled by a (deactivated) flag and be shown translated and directly send the user to the localized version of the current docs.

[DelazJ]

So the next move will be to merge this, apply the fix to releases up to 2.18 and rebuild each of them to get the message online. Right?

[SrNetoChan]

Looks good to merge. I think we could also use this for the testing version warning. I will give it a try once this is merged and applied to old versions.

[m-kuhn]

@SrNetoChan I'd propose to backport #4274 instead