[#1814] Mark - Swap double for single quotes

In cases where no string interpolation is occurring.
[#1814] Mark - Remove unnecessary code
[#1814] Mark - Move generic steps

The child_record_toolbar_steps contained a couple of very generic steps
for clicking a link or button. These steps are in no way specific to the
child record toolbar and in fact are used in many different features.
They have therefore been moved somewhere more appropriate (to
more_web_steps).
[#1814] Mark - Move code into child_record_toolbar_widget
[#1814] Mark - Remove test that doesn't work