autoReveal focus on acitvate

[Farnsi]

Add a fourth option for autoReveal handling

We have

• true explorer always jumps to file
• false explorer not jumps
• focusNoScroll explorer not jumps and focus file

New option:

• focusOnActive explorer jumps to a file if it is ACTIVE selected (by click or keyboard)

Example:

You want always jump to a file when you change the tab or select a file (click) behavior like "explorer.autoReveal": "true".

You have a huge file list and open a file far away from the current file, but you click the wrong file. When you now close the file, it jumps back to the previous file, you have to scroll down again. Really annoying.

You have to teach yourself to first open the right file and then close the wrong file, but this needs more clicks, even more annoying.

The solution would be, if you click the wrong file and directly afterwards (ctrl+w) close it, the explorer stay where it is until you set the cursor back into editor (or move the cursor or type something, when the previous file has focus).

[VSCodeTriageBot]

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Happy Coding!