Speed up the localization of dynamic strings

I noticed that the English UI was considerably slower than the other languages when switching between pages (on my Linux VM it was 9 seconds vs. 3 seconds in debug mode). The slowness was due to the fact that L10NSharp processes GetDynamicString() differently if the language is English.
The entire contents of the AddLocalizedHintContentsToDictionary() function has been commented out since 8/20/2014, so it is a private method that does absolutely nothing. https://bitbucket.org/hatton/bloom-desktop/pull-request/188/internationalization-work-for-bloom-2/diff#chg-src/BloomExe/Book/RuntimeInformationInjector.cs