Remove footer, expand layout and move functions to other elements (#689)

* Remove process and discard upload buttons; change upload process to only have one upload status window that is displayed immediately when an upload is triggered.
* Separation of FileTransferHandler: FileTransferHandler was split into 3 parts. One common part remains in the abstract super class. The other pieces were moved to the upload-specific and the streaming-specific subclasses.
* Fix upload process: Fix status visualization in progress window. Move repository transfer to the file upload handler so it can report if the complete upload process succeeded or failed.
* Prevent file upload if no software module or more than one is selected.
* Added Unit Tests and fixed Sonar findings.
* Move upload button from the buttom to the right side of the drag and drop area.
* Remove minimize and resize buttons in progress dialog. Remove unused code.
* Code cleanup and layout adaptions: Remove unnecessary code and fix layout problems when showing the upload button on the right side of the drag and drop area.
* Removed abort functionality for user because of Vaadin bug https://github.com/vaadin/framework/issues/10545
* Fixed Vaadin upload bug by subclassing Upload and overriding necessary methods.
* Disable drag-and-drop area in case no OR more than one software module selected.
* Enhance /adapt unit tests
* Enhance /adapt UI tests

Signed-off-by: Markus Block <markus.block@bosch-si.com>

* First draw, insert delete button in entity tables
* Add shortcuts to cancel/confirm buttons in confirmation dialog
* First draw, target/distribution assignment
* Entity assignments for tables
* Fix table row mark correctly when assigning entities
* Mark the right entity in table when deleting an entity
* Refactor code for distribution tags on deployment view
* Target Tags can be managed with Menu Bar
* Refactor classes for managing tags and types for all entities
* Disable fields correctly when updating/deleting tags and types
* Remove delete and action buttons in the bottom
* Delete Metadata column in tables
* Redesign tables for tags and types. Show action icon for update/delete
* Correct CSS for menubar for tag/type actions
* Add confirmation window when deleting tag or type
* Remove unused code. Fix style for target tag config menu bar
* New abstract classes for target/ds tags
* Reorganize package structure tags, set ids for tags
* Add total targets count in target table, add close icon for menubar
* Add total target label and remove footer styles
* MenuBar is displayed when update/delete action is cancelled, finished, or update/delete modus is left
* Insert EventHandling for show menuBar/CancelButton
* Delete drag & drop criteria where not needed anymore
* Fix mandatory field check in DistributionTypeLayout
* Fix notification message
* Move upload button into drop area
* Enhance /adapt unit tests
* Enhance /adapt UI tests

Signed-off-by: Melanie Retter <melanie.retter@bosch-si.com>

hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/TargetManagement.java

@@ -202,10 +202,10 @@ public interface TargetManagement {
     void delete(@NotEmpty Collection<Long> targetIDs);
 
     /**
-     * Deletes target with the given IDs.
+     * Deletes target with the given controller ID.
      *
      * @param controllerID
-     *            the ID of the targets to be deleted
+     *            the controller ID of the target to be deleted
      * 
      * @throws EntityNotFoundException
      *             if target with given ID does not exist