remove 50+ problems in dart analysis
- replace
list
withlistliteral []
- replace
scaffold
withScaffoldMessenger
- replace
RaisedButton
withElevatedButton
- replace
FlatButton
withTextButton
- replace
OutlineButton
withOutlinedButton
list
with listliteral []
scaffold
with ScaffoldMessenger
RaisedButton
with ElevatedButton
FlatButton
with TextButton
OutlineButton
with OutlinedButton