fixes #803 hiding save and sync buttons in this version of the app since they arent needed, except if you want ot use your user on another machine.
making the decision of which server to log into more robust. fixes #800
not telling user if there was an errror, it seems to always pop up
adding the new font to the css in the minified app
fixes #805 for @kaitire live in version 1.38 (online)  rare fields are now being hidden based on if the user has specifed frequent fields in the corpus, (currently there is no user interface for this) or if based on statistics (if the field appears in over 50% of the datum, it is considered frequent and is not hidden), to berefined in the future. probably consider whether there are many or few fields, and use this as a factor to decide how many to show. also consider a user preference which alows users to customize their interface, superceding the corpus settings