[Clear cache&Remove account] As an iOS user I want to be able to delete the downloaded data on my device so that I don't run out of space

[nasli]

AC:

• Add an button to delete all the downloaded data on an account -> the selected account Clean local cache button #301
• This user story includes the change of place of the option to log out. Multiple users and forced log off #640
• UI: Multiple users and forced log off #640 (comment)

IMPORTANT:

• Favorite offline synced data won't be removed
• Check single account vs multiaccount

TASKS:

• [GIT] Create branch https://github.com/owncloud/ios/tree/clear_cache_button @javiergonzper
• [DEV] Add direct clear cache button in settings view @javiergonzper
• [DEV] Create delete all local files downloaded except the favourites @javiergonzper
• [DEV] Update settings view in order to use old look but remain the refactor per multiaccount, options per account will be set in other menu @nasli
• [DEV] Add dot button instead of current info icon in account rows in Settings view @nasli
• [DEV] Add new menu view with options "Edit Account", "Clear Cache", "Log out" @nasli
• [DEV] Add logic edit account in menu option @nasli
• [DEV] Add logic log out in menu option @nasli
• [DEV] Updated view in order to use also disclosure instead of dots button [Won't Fix] @nasli We use the event of tap in the row to select active account, we would need to use DetailDisclosureButton instead of the disclosureIndicator and now looks like
  . For the moment we consider better UX use the three dot button
• [DEV] Check Title to correct fit with longer accounts names @nasli
• [DEV] Check constraints username account cell @nasli
• [DEV] Add logic clear cache new button menu @nasli
• [DEV] Update title menu with "@" between username and account url @nasli
• [BUG] Crash after switch between accounts @nasli [cannot reproduce]
• [DEV] Update wording "Edit Credentials" @nasli
• [DEV] Update wording "Remove account" @nasli
• [DEV] Define single account UI. Show account also account section @nasli
• [QA] Create Test plan: [PR 669] New account options in settings view QA#235 @jesmrec
• [QA] Validate Test plan @jesmrec
• [GIT] Merge branch "clear_cache_button" @mRoRo

BUGS:

• Option "Edit Credentials" does not work in iPad [BUG-657] Option "Edit Credentials" does not work in iPad #672 @nasli
• Clearing cache with a spinner [IMPROVMENT-657] Clearing cache with a spinner #673 @mRoRo
• Menu chart displaced in iPad [BUG-657] Menu chart displaced in iPad #675 @nasli

PR:#669

[nasli]

@jesmrec ready to review!

[jesmrec]

Approved!!

cc @nasli @mRoRo @javiergonzper