If the page was long enough to have a vertical scrollbar, the check
for `$( window ).width()` would be incorrect because of the width of
the scrollbar itself. The correct value is `$( window ).outerWidth()`.
But rather than deal with that, we can instead use the API
specifically for matching media queries [1], then copy-paste the
media query from CSS and not have to think about it at all!
[1] https://developer.mozilla.org/en-US/docs/Web/API/Window/matchMedia
Bug: T227916
Change-Id: I79478040620391f5391b10aee52134fde0b88adf
Should avoid more of the issues with unwanted appearance of mobile
layouts. Cutoff results in layout switch when sidebar becomes ~a
third of the total window width.
bug: T196213
Change-Id: I9b8baee5fe53316128f864e732c86750b4e5470e
* Reorder ULS and Echo links
* Rename conditional module load hook to be more generic, and add
ULS module
* Remove .active bolding from dropdown
Change-Id: I7e746e7c5af8ffd7c4ca06742ab1fe6bc94ba531
