Saga updates style changes

[cquirosj]

• Reverting changes made to CodeEditor in a previous PR, in favor of allowing passing a collection of extensions which will enable overriding the code mirror theme.
• Removing vendor-specific CSS styles for pulsing animation
• Adding max height for displaying the initial Saga State, which can be huge if the user abuses the Saga Data state class. For subsequent state changes, the content is automatically collapsed by default to display and indicate only what has changed