Run tests with code coverage #102

Currently utPLSQL can be invoked in two ways:

• run tests
• run coverage
  Ideally it should be:
• run tests
• run tests with coverage

So that:

• test runner and test run progress is always visible
• coverage can be inspected alongside test run

The option to run tests with coverage could replace current coverage menu option.

It would be great to be able to run tests with coverage from test runner UI. A new button next to run button could facilitate that.