Select text color needs to be specified to override system color in Linux. Also got rid of he stupid dotted line around focused element text which still occurs in Linux FF.
* Right-padding to account for scrollbar when showing search results.
* No 'max-width' anymore -- width adjusts to popup width.
* Description uses ellilpsis on overflow.
* Still needs info/expando (and need to remove title-text)
* Screenshots have 'object-fit:cover' to fill the space.
Unrelated: Hack for search category 'userstyles' (should be userstyles.org)
Unchecked => opens new tab for search page.
Checkbox hidden if inline results are shown (still shows link to "find styles" which opens a new tab by-default).
Main diff: Wrapped onDOMready() & SearchResults() function in IIFE closure.
* [X] const SearchResults = ... // should be inside a closure (IIFE @ Top)
* [X] SearchUserstyles should be firstLetterLowercase
* [X] Don't fetch category on load; use regexp to derive category. (left 'HEAD' code commented-out).
* [X] Don't use XMLHttpRequest() anymore (used in 3 places?): Use download() which accepts custom request params.
* [X] Remove unused getters ('getCurrentPage' & others?)
* [X] const BASE_USO_URL = 'https://userstyles.org'; @ top of searchResults closure. Refer elsewhere.
* [X] const searchUrl = new URL... should be a single multiline statement (new URL('...' +\ '...'
* [X] .innerHTML = ... // use .textContent = ... instead
* [X] Don't use `setAttribute` on 'disabled': $('..-prev').disabled = currentDisplayedPage <= 1 || loading
* [X] Don't use .indexOf() on strings, use .includes()
* [X] Move onDOMReady() code to top of file.
