GestureDetector of FAB called on opening a workshop

[Vikhyath08]

An exception is thrown when any workshop is opened and it seems to be related, somehow, to a line in the GestureDetector in the home _widgets.dart file here.

════════ Exception caught by gesture ═══════════════════════════════════════════
The following NoSuchMethodError was thrown while handling a gesture:
The getter 'currentState' was called on null.
Receiver: null
Tried calling: currentState

I've pushed a hotfix to it in #220 , but it's certainly something to look into.