As part of Premium in Premium project, unlimited premium themes will
now be offered to all sites that have a Premium plan too. It was decided
to implement this by adding unlimited-premium-themes sticker to those
sites. That means that we can no longer use this sticker to reliably determine
the presence of the business plan. Because of that we are switching to a new
one that was introduced as a replacement (business-plan).

Differential Revision: https://[private link]

Merges r152594-wpcom.

…size resulted in bad things.

Switching back to the original params, albeit passing it through `jetpack_photon_url()` now as the newer Jetpack code did.

Context: #3680

See: https://[private link]

Merges r152553-wpcom.

Summary:
About a week ago, some users report image stretching in https://[private link]

This bug was introduced in r152512 and subsequently partially reverted in r152553. This week, we had [reports](https://[private link]) of a different image distortion issue that's most evident on smaller screen sizes. The fix for the one issues seems to cause the other issue to occur, and vice versa. I think square galleries may be the problem here. The original change didn't specify a crop, so uncropped items in a square gallery were being squeezed into a square. Forcing the crop fixed that issue, but I think it fixed it too aggressively.

I played around with a few fixes to try to fix this up for both reported cases, but nothing worked until I decided to try making the assumption that we should crop only if image width and height were the same. This fix seems to solve the problem for both cases that've been reported, but I'm sure there must be other cases I don't know to check, and this isn't code I know well at all.

Test Plan:
Original issue repro:
1. Get tiled-gallery/tiled-gallery-item.php into the state given here: https://[private link].php
2. Sandbox [private link] and mathildedl.com.
3. View https://mathildedl.com/photos/#jp-carousel-312
4. Observe that the square image in the gallery looks fine but the expanded image is distorted

Second issue repro:
1. Update to get trunk on wpcom.
2. Sandbox [private link] and janicednelson.com
3. View https://janicednelson.com/galleries-2/portrait-gallery/?concat_js=no
4. In the browser dev tools, switch to a mobile view (a simple browser resize may also work).
5. Observe that the images become distorted.

To verify the fix, apply this patch and re-test both scenarios above.

Reviewers: georgestephanis, dbtlr, panoskountanis

Differential Revision: https://[private link]

Merges r153049-wpcom.

…mber of columns can't be less then 1.

Merges r144549-wpcom.

* Remove debounce function and use setTimeout() instead
* Rename function responsive_videos() to responsiveVideos()
* Rename variables

Merges r134991-wpcom.

* Remove debounce function and use setTimeout() instead
* Rename function responsive_videos() to responsiveVideos()
* Rename variables

Merges r134991-wpcom.

If link is present in options but the connection is no longer available or invalid (e.g. app-scoped token), the user will not be presented with the option to unselect a connected service.

These changes iterate over all available services and checks for presence of link option. While we can't show the display name, we can still allow them to unselect the option.

See: https://[private link]

Merges r138651-wpcom.

Previously it was not possible to have a SoundCloud embed in non-"Visual" style (second variant on Share Embed modal) because
plugin logic would try to find option which we don't expose, defaulting to "Visual". Here, we skip consideration of options
and instead test param directly.

Also removes redundant oEmbed registration (now in core, avoid potential conflict).

See: https://[private link]
See: https://[private link]
See: https://[private link]

Merges r153115-wpcom.