Correctly get users from database, refs #1268.
Correcting error - ClassNotFoundException: Attempted to load class "Forbidden" from namespace "Symfony\Component\HttpKernel\Exception”.
Switching to Exception\AccessDeniedHttpException.
Adding namespace. Refs. https://github.com/zikula/core/pull/1468.
Fixed annotation @thrown -> @throw
Fix variable reference
prevent form serialization errors in session
Merge pull request #1520 from craigh/formfix

prevent form serialization errors in session
Fixed formatting
Merge pull request #1391 from cmfcmf/users-autocomplete

[WIP] Correctly get users from database, refs #1268.
Menutree external dynamic link for Content updated

Including less stuff during getPages, otherwise too much API's get called where this is not necessary and increases load times !
Updated external dynamic links menutree with Clip

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | -
| Fixed tickets | -
| Refs tickets  | -
| License       | MIT
| Doc PR        | -

Clip publications are added to the available list of links one can dynamically add/generate in a menutree menu. I have this active currently already in Zikula Core 1.3.6 with the current Clip from Github. 

Of course the future of Clip is uncertain. So maybe this can be discussed before pulled.
Updated MenutreeApi for typo in comments

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | -
| Fixed tickets | -
| Refs tickets  | #1524
| License       | MIT
| Doc PR        |
Updated the MenutreeApi for lowercase method names

The method Content and Clip had uppercase names, adjusted.
Also adjusted MenutreeUtil call, which changed from Core 136 to 137
Merge pull request #1523 from espaan/patch-28

Menutree external dynamic link for Content updated
Merge pull request #1524 from espaan/patch-29

Updated external dynamic links menutree with Clip
Correcting icon name.
Merge pull request #1526 from shefik/login_icon

Correcting icon name.
improve js validation
add css display class to timepicker