Improvements to the `Settings` page

[rocket-3]

The default deadline for a task is 10 days. Sometimes you (as me) may need to change it.
So my proposal is about to add deadline setting to the repository/settings page.
And also the questions:

1. Which may be the way to access deadline setting through self-web? (I'll try investigate, but later)
2. Other ways to set custom deadline for a task (a command to bot or label) - WDYT?
3. You stated about big changes in future, so how long and can we await for a such feature with/before these changes?

[zoeself]

@rocket-3 thank you for reporting this. I'll assign someone to take care of it soon.

[zoeself]

@amihaiemil I couldn't find any assignee for this task. This is either because there are no contributors with role DEV available or because the project does not have enough funds.

Please, make sure there is at least one available contributor with the required role and the project can afford to pay them.

[amihaiemil]

@rocket-3 good points - however, it's going to take some time, as this is not a priority at the moment :)

On the other hand, you can simply take the expired task out of scope and add it back in, it will have the same effect - 10 days prolonged deadline. There is no reputation points or such system in self-xdsd (as it was with 0crat), so there will be no problem.