Multi Account

[ogoffart]

Note: the work is currently done in the master branch

• Refactor libowncloudsync to always have an AccountPtr and not rely on a global one
• Investigate all remaining uses of AccountManager::instance()->accounts().value(0)
• Store folders below accounts in config
• GUI: adapt the setup wizard
• GUI: put account list in the top bar
• GUI: put account list in the top bar (Mac)
• GUI: Systemtray icon adaptation
• Migration from old config
• port accountmigrator.cpp -> Test the branding migration with multi account #3515
• Adapt the ShareDialog
• Do something with general error (AccountSettings::setGeneralErrors)
• Define a shorter displayName for Accounts or allow users to assign one -> [OS X] Shorten the name of the accounts in the toolbar. #3516
• Remove accounts
• Set the logged in / logged out state per account
• Activity list
• Restriction in the theme for single account -> Restriction in the theme for single account for branded client #3517

(This is an implementation ticket, please do not comment with anything not implementation-related)

[ogoffart]

As of today, the branch is somehow working, but there is still some work to do before it can be merged to master.
The code currently is not working on mac, or not working with Qt4 and old compilers yet.