continue: added support for unshelve...
continue: added support for unshelve
This patch adds the support for `ushelve` in `hg continue` plan.
`hgcontinueunshelve()` has been created for independent calls.
In case an interrupted unshelve is resumed via hg continue the
shelvedstate needs to be loaded seperately. This has been
ensured by `_loadunshelvedstate()`
`hgcontinueunshelve()` is then registered as `continuefunc` for state
detection API.
Results are shown as tests.
Differential Revision:
https://phab.mercurial-scm.org/D6652
