Add unselect_current command for tab mltiselect

[yaroslavyaroslav]

Problem description

Currently if user working with multiple tabs there's a lack of ways to manage presence of a given tab in the row with keyboard. User is capable to unselect either one to the left or to the right or all but one. But no command for close a selected tab provided, which is often a required action to do.

https://www.sublimetext.com/docs/tab_multi-select.html

Preferred solution

Provide command unselect_current with attrubutes { move_to_right: Bool } that would unselects just a currently selected tab from the row and make active left or right regarding the argument provided.

Alternatives

None

Additional Information

No response