Issue 6599 - Added data corruption warning to first-run page
This MR includes the following changes:
- Added data corruption message
- Introduced "dataCorrupted" parameter
- Updated general warning styles for consistency between the two messages
- Removed code that checks whether
require("subscriptionInit")
is truthy because (a) that module was only missing from the legacy Firefox version and (b) requiring a missing module will now throw
Note that the "help_center" documentation link doesn't exist yet (see https://gitlab.com/eyeo/adblockplus/adblockplusui/issues/68#note_70118698) and needs to be provided sometime the release.