Fix theme issues on login page

[bdmendes]

Closes #907

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 #922 (fa04b26) into develop (913d188) will decrease coverage by 0.02%.
Report is 1 commits behind head on develop.
The diff coverage is 0.00%.

❗ Current head fa04b26 differs from pull request most recent head af9d64f. Consider uploading reports for the commit af9d64f to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #922      +/-   ##
===========================================
- Coverage    21.22%   21.21%   -0.02%     
===========================================
  Files          136      136              
  Lines         3514     3511       -3     
===========================================
- Hits           746      745       -1     
+ Misses        2768     2766       -2     

Files Changed	Coverage Δ
uni/lib/view/login/login.dart	0.67% <0.00%> (+0.01%)	⬆️

... and 2 files with indirect coverage changes

[thePeras]

Just that? What changed?

[bdmendes]

Just that? What changed?

The widgets were being generated as children of the context outside the theme (see the variable name change).

[thePeras]

Just that? What changed?

The widgets were being generated as children of the context outside the theme (see the variable name change).

Oh, I see it! createSafeLoginButton(context) sneaky bastard

[thePeras]

✅ 🛫

[Process-ing]

Lgtm!