fixes #1863
fixes for #1865
fix post functional test
fixes #1865
More fixes for #1865

* Reltag calculator
* Artist default urls (fixes #1149)
* Post count cache
fixes #1625
for #1896

modify Artists to Listing in /artist_versions
for #1896

modify Posts to Listing in /post_versions
fixes for #1895
fixes #1789
fixes #1729
fixes #1851
fix tag impl listing
fixes #1900
fixes #1899
Change pool category class location

In order to make blacklisting by category easier.
#1875: Add support for dialog when uploading
Merge branch 'master' of https://github.com/r888888888/danbooru
#1875: Add shift-e shortcut for opening dialog

Additionally, fit the textarea's size to its contents on open.
Remove unused variable