Show active state for formatting icons

[swilkinson1]

There is no indication of which formatting option is active, both when first selecting it and also when you place the cursor back into a section of formatted text.

[massivespace]

The OnDecorationStateListener provides feedback when you click on text. However, it doesn't provide feedback when the text is long click selected (i.e. if you long click select a word). Maybe something like RE.editor.addEventListener("touchend", RE.enableEditingItems, false); could be added to the rich_editor.js file to handle that case.