More dimension extraction

Added new styles for help dialog text
Renamed some dimensions
Extracted hard-coded retry string to strings resource

Change-Id: I3ab30c2639c068cf471c34f58480ba6beb5d2d18
Change details URL formatting

Change-Id: I34f0d68442bcb8196fe9c99d4da95b7b479962fc
PatchSetViewerFragment: Fixed call to GerritService
GerritURL: Use 'Get Change Detail' endpoint when requested change details
VersionProcessor: Add HTTP response code check for 404.