In the MediaWiki API, booleans exist or don't exist (with an empty string),
you can't check "if (bool)..." since that will always be false. The API has
a newer formatversion=2 that fixes this but we're not using that yet.
Also update the defaultSource placeholder to match the API response. If one
would only update defaultSource without the 'if'-fix, one can reproduce T66822
on a local wiki (JSON-P request instead of JSON).
Bug: T66822
Change-Id: I5a8ab1136325c33c62982c0869fa14ca2fb26034
Generalize MWResourceQueue and MWResourceProvider so they are
extending the general classes from ve-core. This also allows for
tests in ve-core on the resource queue system.
* Depends on ve-core change I5346081317e *
Change-Id: If34cd99334f4ccb93015c3646f68ae3040b9c5d7
Change the media search widget to work with resource queues and
providers. Create providers based on the user's filerepo settings
and aggregate their responses with the media queue. Stop asking
for more results from providers that are depleted.
Also fixes a rather nasty infinite-loop bug where the API returns
only very few images, and the UI keeps asking for more.
Bug: T78161
Bug: T88764
Change-Id: I65aed3446cd1f056476c56e6e04522c70e49e595
