[regression] themeTester no longer honors theme, dir, etc. query params

[Kenneth G. Franqueiro]

dijit/themes/themeTester.html in trunk doesn't honor the theme and dir (and presumably other) query params, which are quite important and useful in the context of this page.

The reason would appear to be that dijit/tests/_testCommon.js is no longer loaded. In 1.6, this was loaded via a normal script tag. It would appear that in trunk, it was attempted to be loaded as a module (and indeed looks to be one), but is currently commented out. (I'd point out that its commenting predates the latest revision of that line.)

Upon uncommenting that line, themeTester still appears to work under normal (param-less) circumstances, as well as with dir=rtl. However, specifying a theme (even redundantly specifying claro) results in nothing but a blank page.

[Kenneth G. Franqueiro]

It would appear there may actually be an error *in* _testCommon.js actually... Although I don't see any errors reported when I try to include it in themeTester.html, if I go to other test pages that use it (e.g. dijit/tests/test_Calendar.html, dijit/tests/test_Toolbar.html, ...) if I add ?theme=... to the URL, I end up with the following error:

loadFuncs[i] is not a function (_testCommon.js:123)

[Kenneth G. Franqueiro]

Upon a bit more investigation, reverting the last change to _testCommon.js ([26353]) seems to make theme switching on other test pages work again, but it still doesn't resolve the issue in themeTester.

Now I'm not sure if I've actually found two separate issues, or what...

[bill]

In [26690]:

Get ?theme=... working again for dijit test files. Refs #13993 !strict.

[bill]

In [26693]:

Convert _testCommon.js to granular dependencies. Still not using define() because this files is included in hundreds of test files via <script src=...> rather than by require(...). Refs #13993 !strict.

[bill]

In [26694]:

Get ?theme=... working again for themeTester.html. In order to not confuse AMD loader, isolate insertion of <link> nodes to when no AMD activity (i.e. no loading of JS files) is occurring. Fixes #13993 !strict.

[bill]

In [26695]:

Get ?theme=... working again for IE. Need to use special method to insert stylesheets on IE. Refs #13993 !strict.

[bill]

In [26696]:

code reduction, plus better attempt to change document.css for IE, refs #13993 !strict.