Merge javaclass annotation trees into one tree

Within the current javaclass UI, annotationliteralal, annotation-type, and annotation-list are separated into three different sections, and the annotation-type and annotation-list section contain trees to represent their respective hierarchy. This works, and I like how each section has a useful description explaining the usage; however, I think that a single tree that uses background colors to differentiate the different groups could be used to accomplish the same thing. As for the sections descriptions, these could be integrated into the buttons used for creating each element, and this button bar could be dynamically populated/updated depending on the selection within the tree. For example, if nothing is selected in the tree, the button bar would have three buttons ("Add annotation-literal", "Add annotation-type", and "Add annotation-list").