LB-545: Embed URL crashes if a user who has published posts is deleted
* some initial overwriting
Merge branch 'devel' into lb-545-user-retirement
LB-545: Embed URL crashes if a user who has published posts is deleted
* adjusting
LB-545: Embed URL crashes if a user who has published posts is deleted
* deletion set as inactivation
LB-545: Embed URL crashes if a user who has published posts is deleted
* adjusted
Merge branch 'liveblog-15' into lb-545-user-retirement
LB-545: Embed URL crashes if a user who has published posts is deleted
* adjusted
LB-545: Embed URL crashes if a user who has published posts is deleted
* adjusted the upgrade script
LB-877: Not able to post chained blog posts

Try to search for chain blog author if not found in prefetched
collaborators.
Merge pull request #272 from petrjasek/lb-877-chained-post-user-err

Lb 877 chained post user err
LB-877: Not able to post chained blog posts

Fix resolving of chained post with new author.
Merge pull request #273 from petrjasek/lb-877-chained-post-user-err

Lb 877 chained post user err
Merge pull request #250 from msat-cont/lb-545-user-retirement

LB-545: Embed URL crashes if a user who has published posts is deleted
LB-867 : Header search boxes on some sources tabs goes over list

Fixed
Merge pull request #275 from nidzix/liveblog-15

Transfer Ally-Py/pull/64 to liveblog15
LB-878: In the case of link and image post types after a post is added the custom link/image edit form is not showed

Call changetype on save to reload the selected type form.
Merge pull request #277 from petrjasek/lb-878-form-type-change

Lb 878 form type change
Merge branch 'liveblog-15' into lb-860-limits-for-collab-list

Conflicts:
	plugins/livedesk/livedesk/impl/blog_collaborator.py