Bug fixes

• 71ed575: Fix exception on substring in exception watcher with negative length substrings, reported by @VowganDesign
• 1f4704b: More complete type reference finding to capture properties' and fields' return types as referenced types in the exposure tree view
• 726ae77: Fix issue with namespaces not getting handled correctly as using statements in some cases
• ea574fe: Fix issue with the runtime exception watcher sometimes failing to initialize and causing error spam in the output log