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-855: Delete the population of root user
* root user not populated
LB-863: After a blog is closed it should disappear from Live Blog menu
* isOpen filter parameter for blogs
LB-860: On Manage Collaborators -> add new collaborators, it is showed only first 20 collaborators.
* limit-filter added
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
LB-545: Embed URL crashes if a user who has published posts is deleted
* db upgrade adjusted
Merge pull request #278 from msat-cont/lb-545-user-retirement

LB-545: user retirement