Show fetching warning only when people dont use manual ua
Function to check if it's allowed to show a warning message
Merge branch 'trunk' of github.com:Yoast/google-analytics-for-wordpress into stories/PVW/warningissue

Conflicts:
	admin/class-admin.php
Merge pull request #249 from Yoast/stories/PVW/warningissue

Warning issues