Hide error if a background request fails during navigation

[ChristophWurst]

If you open the dashboard but quickly navigate somewhere else, a toast
will show telling you that the weather status could not be fetched. As a
user I don't care about this. This is only relevant if the user intents
to no leave the page.

So let's not show a toast for aborted connections. This makes the UX a
tad smoother.

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 32387: failure

acceptance-app-files

• tests/acceptance/features/app-files.feature:262

Show full log

  Scenario: unmarking a file as favorite causes the file list to be sorted again                          # /drone/src/tests/acceptance/features/app-files.feature:262
    Given I am logged in                                                                                  # LoginPageContext::iAmLoggedIn()
    And I create a new folder named "A name alphabetically lower than welcome.txt"                        # FileListContext::iCreateANewFolderNamed()
    And I see that "A name alphabetically lower than welcome.txt" precedes "welcome.txt" in the file list # FileListContext::iSeeThatPrecedesInTheFileList()
    And I close the details view                                                                          # FilesAppContext::iCloseTheDetailsView()
    And I see that the details view is closed                                                             # FilesAppContext::iSeeThatTheDetailsViewIsClosed()
      │ Details view in Files app visibility could not be got
      │ Exception message: Element is no longer attached to the DOM
      │ For documentation on this error, please visit: http://seleniumhq.org/exceptions/stale_element_reference.html
      │ Build info: version: '2.53.1', revision: 'a36b8b1', time: '2016-06-30 17:37:03'
      │ System info: host: 'b3afab534e61', ip: '172.27.0.2', os.name: 'Linux', os.arch: 'amd64', os.version: '4.15.0-76-generic', java.version: '1.8.0_91'
      │ Driver info: driver.version: unknown
      │ Trying again
      │ 
    And I mark "welcome.txt" as favorite                                                                  # FileListContext::iMarkAsFavorite()
    And I see that "welcome.txt" is marked as favorite                                                    # FileListContext::iSeeThatIsMarkedAsFavorite()
    And I see that "welcome.txt" precedes "A name alphabetically lower than welcome.txt" in the file list # FileListContext::iSeeThatPrecedesInTheFileList()
    When I unmark "welcome.txt" as favorite                                                               # FileListContext::iUnmarkAsFavorite()
    Then I see that "welcome.txt" is not marked as favorite                                               # FileListContext::iSeeThatIsNotMarkedAsFavorite()
      Not favorited state icon for file welcome.txt in file list could not be found after 100 seconds (NoSuchElementException)
    And I see that "A name alphabetically lower than welcome.txt" precedes "welcome.txt" in the file list # FileListContext::iSeeThatPrecedesInTheFileList()