Merge pull request #2054 from xillibit/k30_bugs20

#1676 Users Online issue: List and count of uers aren't the same
Load all topics subscribed at once when edit an user in backend
Merge pull request #2061 from xillibit/k30_bugs4

Load all topics subscribed at once when edit an user in backend
Fix #1825: Pagination broken in search when keywords contained in quotes
Merge pull request #2074 from mahagr/master

Fix #1825: Pagination broken in search when keywords contained in quotes
Avoid timeouts when recounting statistics
Merge pull request #2075 from mahagr/master

Avoid timeouts when recounting statistics
Fix #2078: User manager regression from #2061
Merge pull request #2079 from mahagr/master

Fix #2078: User manager regression from #2061
Allow multiple different paginations on one page
Merge pull request #2080 from mahagr/master

Allow multiple different paginations on one page
SEO optimisation : set h1 et h2 in corrects places