Show which Storage Account a tab is from without hovering

[JakeRadMSFT]

Storage Explorer Version: 0.9.6

OS Version: Windows 10 (All)

Steps to Reproduce:

1. Open Blob Container form Storage Account A
2. Open Blob Container form Storage Account B

Expected Experience: Able to see which account a blob container is from.

Actual Experience: If you have two blob containers with the same name it's hard to tell where they're from.

[MRayermannMSFT]

@richardmsft please come up with a UX design and API design proposal for the team.