CP-5604: Added menu item "Show all" on the location and severity filter. Renamed the "No filter" item to "Show all" on the dates filter. Reordered top ToolStripMenuItems on the AlertSummaryDialog and changed their access hotkeys. Reordered columns on the alerts DataGridView.

Signed-off-by: Konstantina Chremmou <Konstantina.Chremmou@citrix.com>
CP-5604: Converted the "Dismiss All" ToolStripButton on the Alerts dialog to a ToolStripSplitButton with the options to "Dismiss All" or "Dismiss Selected" alerts. Minor code tidy.

Signed-off-by: Konstantina Chremmou <Konstantina.Chremmou@citrix.com>
CP-5604: Merged columns "Name" and "Description" to a single column "Message" on the updates dialog. Added expander column to allow expanding/collapsing rows. Reordered columns. (At the moment there is some duplicate code between the Updates and the Alerts dialog; this will be rectified soon).

Signed-off-by: Konstantina Chremmou <Konstantina.Chremmou@citrix.com>
Merge remote-tracking branch 'origin/master'