Make Sena 3 openable on first run, if installed

* Set link to point to a valid sample db
* Set Welcome dialog to not offer non-existant db
  If the user doesn't install the sample db,
  we don't want the Welcome dialog to offer it as
  an option.

Change-Id: If7559013f7d330bbd8a73eb2c551993168f15112
Fix LT-13964 Word Grammar for Hermit Crab not seeing all feature specs

Change-Id: I7d9649a3b061b1362f31b67649f758daf7f2c4b9