Add Nexus repository URLs to enable publishing build artifacts

Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Bug 408190 - Action selections are created every time a selection is changed in the sidebar in the editor view
Bug 408190 - Action selections are created every time a selection is changed in the sidebar
Bug 408154 - Add option to the command constructor to allow imageClass to be appended elements
Bug 408154 - Added the go up image class directly to the button element and fixed the styling for the go-up sprite.
Sidebar: prevent error when running navigator commands with no editor
Bug 408061 - [sidebar] Drilling into folder with no selection fails to render commands