#3518708 Fix for inline vh units causing iframe to grow infinitely

Fix for inline vh units of elements in the preview to be converted to static height based on height of iframe

Closes #3518708

approved this merge request

added 70 commits

• a7590ee8...e8882c79 - 69 commits from branch project:0.x
• b5a668a2 - Fix for inline vh units of elements in the preview to be converted to static...

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