Merge pull request #611 from Sancus/916313-tshirtsizestring

[Fix Bug 916313] Show t-shirt size on profile as string
Merge pull request #610 from Sancus/tshirtprivacy

[Fix Bug 916319] Only show t-shirt sizes to privileged users and make admin privileged by default
[Bug 881852] Some tests for profile external accounts
[Fix Bug 881852] Improvements/fixes to multi-account code