help_en synced to SVN EdiromHelp and many more changes for help

* removed generated IDs from conversion to TEI P5; * where applicable,
inserted tei:head in tei:figure; * overhauled priority images to match
new figure-structure; * prettified XML indentation; wrapped annotation
categories table with figure; * added description of Annotation View's
TaskBar Buttons; added TaskBar screenshot; * corrected figure head of
Tool Bar;* changed ID from toolbar_bottom to help_view.desktop.TaskBar;
* added description of annotationOverview.png; * added TODO comments; *
matched EdiromHelp SVN and GitHub; * added workspace-switcher.png;