Close open tabs on View Code

[mfornet]

When View Code command is called the following tabs should be closed:

• Tabs about test cases
• Tabs about files that are not related about the current project.

Nice to have: They layout will change to single and the main solution is opened. Instead of opening the main solution open the current active document if it is not a test case.

Edge case: What about tabs that are not saved and should be closed. Options:

1. Save + Close
2. Ask to save + Close
3. Ignore
4. Close (without saving) (this should be avoided)

[gilcu3]

At least in my workflow, I only need the tabs about testcases to be closed, and I think all of them could be saved at the time I want to switch to code view.