Add ability to set SD Card as a separate tab #508

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

I have phone with SD card, which I use as a backup. This results in frequently moving files between internal storage and SD card. The only way to switch file manager view is a small button at the upper left corner of the screen. It's not only unergonomic but also does not retain you current folder view (path). I would like the ability to set SD Card as it's own separate tab.

Why do you want this feature?

To improve quality of live for users using more than just internal storage.

Additional information

This feature could be opt in, and could be added in already existing menu settings -> Manage shown tabs.