Macro is not recognized when clicking it in an editor

[ashklianko]

Use "factbox" macro in intro/movie app and add some html in the body, then insert it into an editor: clicking or selecting inserted macro doesn't toggle "macro" button in toolbar

[ashklianko]

Will postpone it a bit, too many details to take into account so can be error prone, going to continue after other bugs solved

[ashklianko]

Macros with a body can be split by editor if macro's body contains block elements, thus we get macro that is not located within one element, but now is scattered through a set of elements. Example from a fact box macro:

<p>need to say also that [factbox header="Fact Box"]</p>

<p>Macro body</p>

<ul>
	<li>still macro body, but in a list</li>
	<li>still macro body, but in a list</li>
</ul>

<p>Also macro body</p>

<p>[/factbox]</p>

Challenges:

• identify that clicked position is within some macro, that requires traversing tree around
• correctly extracting macro's top and bottom headers and it's body that may consist of multiple elements
• calculating exact location of macro in editor so it can be accurately replaced after updating macro in the Insert Macro dialog