Remove necessity of icon class

Only the icon specific class is needed
disable autocomplete for shared link password input, fix #7419
close encryption session after decryption was finished
Translate string when an error occured while sending a forgot password mail

Fix #7423
adding test for migrations on columns using keywords
let's name the column 'select' because this is a keyword on all platforms
Merge pull request #7425 from owncloud/issue/7423

Translate string when an error occured while sending a forgot password mail
Merge pull request #7421 from owncloud/password-input

disable autocomplete for shared link password input, fix #7419
remove unused code and fix wrong variable names - some PHPDoc updated
Also quote old column name during DB migration

This fixes alter table commands that didn't quote the old column name
use assertSame and assertNotSame for etag checks
use assertInternalType for typechecking
Merge pull request #7432 from owncloud/enc_cleanup_session_after_decrypt_all

close encryption session after decryption was finished
remove border from log in input fields, simpler and works better with themes
rename config to camelcase
Installation: relabel 'Advanced' to more descriptive 'Storage & database'
Merge pull request #7450 from owncloud/rename-advanced

Installation: relabel 'Advanced' to more descriptive 'Storage & database'
initialize etags of temporary storage
icons: automatically show delete hover instead of using explicit class
Merge pull request #7449 from owncloud/remove-input-border

remove border from log in input fields, simpler and works better with themes