#4632: Allow plugins to not support certain embedding styles.
#4632: Add list of allowed embed types for applicable boxes.
#4632: Override template for web_widgets_iframe.
#4632: Move embed link to bottom corner.
#4632: Pass iframe size to parent page using postMessage.
#4632: Remove debugging lines.
#4632: Remove inline from accepted embeds on all plugins.
#4632: Don't display 'Make Embed' option if a plugin doesn't allow any embed methods.
Merge SCHOLAR-3.x into 4632-popup_tweaks.
#4632: Spelling.
Merge pull request #4699 from openscholar/4632-popup_tweaks

Embedding refinements