Adopt quick pick item guidance in Remote Repositories

[joyceerhl]

We now have team wide quick pick item guidance microsoft/vscode#158895

We should adopt this guidance in Remote Repositories' pickers.

Originally reported by @jrieken

• be on vscode.dev
• pick a branch form the status bar picker
• picker has a title and that's something we usually don't do, e.g desktop/file doesn't

[eleanorjboyd]

is there anything extra I need in order to get the new version of vscode.dev? Currently, it seems my quick picker still has a title

[joyceerhl]

Are you using insiders.vscode.dev or vscode.dev?

[eleanorjboyd]

hm I was actually on github.dev- I should be using insider.vscode.dev?

[joyceerhl]

Yes, please use insiders.vscode.dev as that ships both latest VS Code Insiders and latest RemoteHub. github.dev only ships stable RemoteHub regardless of VS Code quality, so should not be used for VS Code verification