Extend all stakes

[micahalcorn]

As requested in Discord:

Would be great to have an 'extend all' button where the user can proceed to determine the lockup extension period and in doing so a multi-call will occur - extending multiple positions instead of tediously going one by one.

[micahalcorn]

Requested again:

if multiple dates can extend, is it possible to just group them and stake them together in one transaction?