Allow to download an artifact from the UI (#786) (#944)

This feature allows to download the artifact from the Artifact details
table

Review points are handled

Signed-off-by: usb1cob <Anbazhakan.Subramaniam@in.bosch.com>

hawkbit-ui/src/main/resources/messages.properties

@@ -304,6 +304,7 @@ tooltip.next.maintenance.window = next on {0}
 tooltip.target.attributes.update.request = Request attributes update
 tooltip.target.attributes.update.requested = Update already requested
 tooltip.documentation.link=Documentation
+tooltip.artifact.download=Download Artifact
 
 #rollout action
 tooltip.rollout.run = Run
@@ -472,7 +473,7 @@ message.upload.fileSizeQuota = Maximum artifact size ({0}) exceeded
 message.upload.storageQuota = Storage quota exceeded, {0} left
 message.uploadedfile.illegalFilename = Filename contains illegal characters
 message.artifact.deleted = Artifact with file {0} deleted successfully
-
+message.artifact.download.failure = Artifact Download Failed
 
 artifact.upload.popup.caption = Upload status
 artifact.upload.status.caption = Status