These action chains are invalid for later versions of selenium (which
are needed for upgrading the version of firefox we test on); they will
result in output like this:
```
WebDriverException: Message: UnknownError: Cannot release a button when no button is pressed.'UnknownError: Cannot release a button when no button is pressed.' when calling method: [wdIMouse::up]
Stacktrace:
at FirefoxDriver.prototype.mouseButtonUp (file:///tmp/tmp6LL1Ye/extensions/fxdriver@googlecode.com/components/driver-component.js:10979)
at DelayedCommand.prototype.executeInternal_/h (file:///tmp/tmp6LL1Ye/extensions/fxdriver@googlecode.com/components/command-processor.js:12534)
at DelayedCommand.prototype.executeInternal_ (file:///tmp/tmp6LL1Ye/extensions/fxdriver@googlecode.com/components/command-processor.js:12539)
at DelayedCommand.prototype.execute/< (file:///tmp/tmp6LL1Ye/extensions/fxdriver@googlecode.com/components/command-processor.js:12481)
```
This eliminates some flakiness related to the loading of the notes page. It also
sets the 'no content' version of that page as a separate page object so testing
that case is more explicit.
TE-849
