jquery.fileupload offers the [`pastezone`](https://github.com/blueimp/jQuery-File-Upload/wiki/Options#pastezone) functionality. This functionality is enabled by default and if somebody copy-pastes something into Chrome it will automatically trigger an upload of the content to any configured jquery.fileupload element embedded in the JS.
This implementation triggers some problems:
1. The pastezone is defined globally by default (🙈). So if there are multiple fileupload's on a page (such as in the personal settings) then stuff is going to be uploaded to all embedded uploads.
2. Our server code is not able to parse the data. For example for uploads in the files app we expect a file name which is not specified => Just an error is thrown. You can reproduce this by taking a file into your clipboard and in Chrome then pressing <kbd>CTRL + V</kbd>.
3. When copy-pasting some string from MS Office on the personal page a temporary avatar with said content is created.
Considering that this is anyways was never working at all and causes bugs I've set the `pastezone` to `null`. This mens that upload via copy and paste will be disabled.
Lesson learned: Third-party JS libraries can have some weird details.
add colon to translated string
use placeholder in t()
Adding a size limitation for avatar upload
Unit test for file size
Fix typo & display server side error message
* the placeholder is in IE 8 and 9 just set as text and
styled a bit grey. If the form is then serialized without
typing something in the placeholder is sent as value
* this fixes that behaviour for the password field and
properly detects empyt passwords
* fixes#14912
Fixes new avatar selection in master half, other half will work when https://github.com/owncloud/core/pull/14266 has get merged.
Shocking to see how much places in our code do it wrong 🔫
* introduced new route settings/users/{id}/mailAddress
* kept old responses
* better error messages
* dropped lostpassword.php from settings/ajax
* cleaned up the UserList.add() and hand in user object instead of
each attribute as another parameter
* check for change permission of mail address
* proper response messages
