* Add support for overlay color and duotone
* Add support for custom inner padding
* Wrap all block experimental features in `isFeaturePluginBuild`
* Fix resizable container min height
The container now resizes if, e.g., padding is increased, and can't be resized down
with the handle to a height lower than it's minimum size determined by content and
padding box.
* Fix resizable handle not being fully visible
Previously, `overflow: hidden` was needed because the height constraint and
padding could push the content out of the container. Now this should not be
possible.
* Add an option to the block to decide how is the image fitted to the container
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