[pgAdmin4][Patch]: RM1581 - When switching between query tabs, the selected tab is not ready to run a query

Hi

*This patch contains following changes:*
1) Set focus on query tool once loaded.
2) While switching b/w panels find active tab and set focus on query tool.
3) Remove whitespace from file.

This will allow user to switch b/w panels without insisting user to click
on query tool.

Please find attached patch and review.

Thanks,
Surinder Kumar