[Feature-Request] Keybinding to toggle 'Find in selection'

After opening the 'find' dialog with `ctrl + f`, there are keybindings for every other button on the dialog except for 'Find in selection':

Match Case (`Alt + C`)
Match Whole Word (`Alt + W`)
Toggle regex (`Alt + R`)
Previous match (`Shift + F3`)
Next Match (`F3`)
Close (`Escape`)

I recommend adding an editor command "Toggle 'Find in selection'" with a default keybinding of `Alt + S`