Update html 18-2

^Fix some small issues
+Feature #1601 Crypsis: Category CSS Class Suffix has no effect
+Feature: add color/shadow on moderators posts
^Improved unread: add border-left on tr
#2297 No "Create Account" button on Blue Eagle template mobile version
3.1 HMVC Backend: Notice: Undefined property: KunenaAdminModelUser #2288
3.1 Feature: remember collapse localstorage

+ Feature: remember collapse localstorage
3.1 Feature: announcement collapse localstorage #2305

+ Feature: announcement collapse localstorage
3.1 ^improve localstorage #2305

+ Add setting: Remove cache
 "Last visit date: Today" in profilebox #2301
K3.1 feature-hmvc: Disable Time to create page not working #2318
Merge pull request #2299 from 810/html-fixes-18-2

Update html 18-2
Merge pull request #2300 from 810/Bugs-k3.1

#2297 No "Create Account" button on Blue Eagle template mobile version
Merge pull request #2298 from xillibit/k31_bugs15

3.1 HMVC Backend: Notice: Undefined property: KunenaAdminModelUser #2288
Merge pull request #2305 from 810/feature-crypsis-2

3.1 Feature: remember collapse localstorage
Merge pull request #2319 from xillibit/k31_bugs9

 "Last visit date: Today" in profilebox #2301
Merge pull request #2320 from xillibit/k31_bugs2

K3.1 feature-hmvc: Disable Time to create page not working #2318
Merge pull request #2321 from xillibit/k31_bugs3

 K3.1 feature-hmvc: No Rss links/icons #2317
K3.1 feature-hmvc: Backend Category manager missing string #2311