Tab key replaces selection on single line instead of indenting

This seems to be fixable by setting
```
tab key: "Tab", when: "editorTextFocus && !editorReadonly && !editorTabMovesFocus"
Indent Line key: "Tab", when: "editorTextFocus && !editorReadonly && !editorTabMovesFocus && editorHasSelection"
```
But that disables the indent line key.