Misspelled 'this.' property accesses don't trigger spelling correction fixes

[DanielRosenwasser]

class Thing {
    state: any;
    constructor(state) {
        this.state = state;
    }
    doStuff() {
        this.stat/**/;
    }
}

Expected: A quick fix to correct the spelling to 'state'.

[sandersn]

Note that the error message gives the correct suggestion; it's just missing the quick fix.

[sandersn]

Fix is up at #16844