Fix UI issues

[sofyakurilova]

• Open Sans should be replaced with Google Sans
• When to Cancel closing on Step 3 or Step 4, user is navigated to Step 1 while should be returned to step where he clicked Close
• On Summary page there is no Text information about the next steps
• Also I noticed that when user clicks for the first time ‘Close’ button and Cancel closing, then clicks again for the second time Close button, Confirmation popup is not displayed anymore.
• One more issue is that when user deselects all test modules and clicks Go to next step button, no error message is displayed and only 'Test modules' text become red in color. I see expected result here is explicit error message
  Video after changes
  https://screencast.googleplex.com/cast/NjQ2Mjk2MzY1MjIzMTE2OHwxMDRmM2FiNC02ZA
  https://screencast.googleplex.com/cast/NDU0MzU1OTk0NzUxNzk1Mnw5NzQ2YzA4Mi0yMA
  Tests