Unsaved query tab isn't saved when the current active query tab is not the one has unsaved changes

Steps to reproduce:

1. Create two query tabs
2. Write "SELECT 1" for the first query tab and "SELECT 2" for the second query tab
3. In the second query tab, click delete the first query tab.
4. Unsaved changes dialog is opened. Click the Save button to confirm saving the content of query tab 1 to a file.

Expect behavior:
A file named "Query Tab 1" is downloaded to the user's disk with "SELECT 1" as the content.

Actual behavior:
"Query Tab 2" is actually downloaded.