[FEATURE REQUEST] Create Screenshots (+Branded)

[hosy]

Currently branded screenshots are working for ownCloud online. But it needs to extend the support for special branding cases:

TASKS

• [ ] branded client will be delivered with server URL (URL bar is not available)
• [ ] branded client can add accounts (different server list is showing)
• [ ] back button Manage is not available
• [ ] add a new fastlane lane for the branding clients to create screenshots (without framing)
• [ ] add an ownBrander option to generate screenshots and save it to the Builds Data folder