improvements for uninstall button

This reverts commit f1b3e03f.

[encryption] always take unencrypted size

fix fieldset look, fix #8158

also make strengthify transparent on setup submit - fixes #9436

Fix search results in root dir & deprecate OC_Search_Provider

fix size of breadcrumb separator

[sharing] unshare childrens on delete

Reload the page when the files app encounters an authentication error

show loading feedback also when clicking 'Apps' entry in app list

update snap.js to v2.0.0-rc1

Reload the files app in case of authentication errors, expired tokens or disabled app

Reloading will triger the full server side handeling of those errors

formatting

fix missing semicolon + some jshint warnings

Fix reload call for all subclasses

use case insensitive linguistic sort and compare when connecting to oracle

change order of registering api and capabilities to fix file version previews

Set localhost as default database host for installation

Design polish

Fix FileActions merging override

use icon-confirm instead of text for accepting remote share, works better with translations

Return and use isPreviewAvailable for share previews

When merging FileActions, the register() functio needs to correctly
override the previously merged action handler without affecting the
original one.

All subclasses must also properly return the ajax call object.