Terminal: Clear should not yank focus to the terminal

[cemerick]

• VSCode Version: 1.48.2
• OS Version: Ubuntu 18.04.5

Steps to Reproduce:

1. Have an integrated terminal open
2. Focus an editor
3. Trigger the Terminal: Clear command
4. Notice that your focus is no longer in the editor

Does this issue occur when all extensions are disabled?: Yes

This is a relatively recent change, via #92076 and #92100. It can make working with e.g. watchers (as used by many common build / iterative testing toolchains) much less convenient, since one now needs to take multiple actions to clear the terminal before saving changes and thus triggering a build or test or linter run, etc.

The solution (taking into account the original issue #92076 and looking at @jheiv's change @ jheiv@0db5731) would be to ensure that focus is returned to the current component (whether an editor or the terminal)…or even better, identify why and how calling .clear() on a terminal instance causes focus to move at all in the first place.