hotfix: launch url with toast

[limwa]

Fixes an issue where the future returned by canLaunchUrl was being cast to a bool. Also refactors every launchUrl to use launchUrlWithToast.

Review checklist

• Terms and conditions reflect the current change
• Contains enough appropriate tests
• If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• Properly adds an entry in changelog.md with the change
• If PR includes UI updates/additions, its description has screenshots
• Behavior is as expected
• Clean, well-structured code

[codecov]

Codecov Report

Merging #1186 (8b2e33f) into master (e2e949f) will increase coverage by 1%.
Report is 1 commits behind head on master.
The diff coverage is 0%.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1186   +/-   ##
======================================
+ Coverage      16%     16%   +1%     
======================================
  Files         229     229           
  Lines        6951    6950    -1     
======================================
  Hits         1086    1086           
+ Misses       5865    5864    -1