Exclude the UI layer from coverage

The *.UI assembly (Views/WinForms) is not exercised by the test infrastructure.
Exclude the whole UI module instead of only its Views source folder, so the
coverage percentage reflects testable code.

Author: rwmcintosh

coverage.runsettings

@@ -12,12 +12,13 @@
               <Exclude>
                 <ModulePath>.*FakeItEasy.*</ModulePath>
                 <ModulePath>.*\.Tests\.dll$</ModulePath>
+                <!-- The UI layer cannot be exercised by the test infrastructure -->
+                <ModulePath>.*[\\/]MoBi\.UI\.dll$</ModulePath>
               </Exclude>
             </ModulePaths>
             <Sources>
               <Exclude>
                 <Source>.*\.Designer\.cs$</Source>
-                <Source>.*[\\/]MoBi\.UI[\\/]Views[\\/].*</Source>
               </Exclude>
             </Sources>
           </CodeCoverage>