remove stylesheet. Override getNonExpandedWidth.

OK, though some comments on the code: 1) both tmp_getAlwaysZoomOut and tmp_getNonExpandedWidth are used undeclared, which will show up as warning in the log; to avoid this, declare them with "let tmp_getAlwaysZoomOut, tmp_getNonExpandedWidth;" at a global level (alternatively, as you are using an extension object: make them properties of hideVisibility, e.g. use this._getAlwaysZoomOut instead) 2) defining init() as const variable of type function is unusual - the plain function definition you had before is what virtually every other extension is using 3) just as St, every import except for Lang is unused and can be removed

Thank you. I would fix it.