Add menu bar with Help->About that contains a short description of the
example application.
Remove redundant title string between menu and application content.
Task-number: QTBUG-68652
Change-Id: I31fb386ab9c01eff86b8ed3ef274ba8cfdb0148b
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
* Replace Qt4-style connects.
* Reformat code to adhere to 80 column width.
* Touch comments to make location and style consistent.
* Rename a label in the UI form.
Task-number: QTBUG-68652
Change-Id: Icc592f7b5a013d1806bc36c45057b35472b6efbb
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>