bug#50067: Context menus

[Juri Linkov]

tags 50067 fixed
close 50067 28.0.50
quit

>>> I'm also wondering whether we should add a `context-menu' text property.
>>
>> As soon as such a need arises, a text property could be added as well.
>> But it seems currently much cleaner is to use a single context-menu
>> function for every mode.
>
> Right.  I was thinking that it's pretty likely that all button-like
> things are going to grow a context menu, but we can add `context-menu'
> later if that turns out to be the case.

It would be easier to make more experiments with code in master,
so now merged the branch to master.