Bug 577491: Labels should be in Sentence Style not Title Case

Labels should be in sentence style

Also: Make some names like "Debug" view more obvious

Change-Id: Ic8b50e5b464236363de885338867e8a40e91db6a
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/188189
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Wim Jongman <wim.jongman@remainsoftware.com>
Reviewed-by: Matthias Becker <ma.becker@sap.com>