UI improvements for inline blocks

Here are some suggestions for UI improvement for inline blocks.

• Allow resizing of overlay. This will help content editors who have larger screens to more easily work - especially with properties like TinyMCE/XhtmlString that require more space

• Missing Margin/padding styles for local blocks that are used as properties in a block when opened in the overlay for inline blocks.

• Expand/collapse sections (tabs) - especially for properties that are not part of the default content section (tab) would be great to allow to not be expanded by default. Example: Advanced tab/section with layout properties.