Fix the background colour when replying.

[pixlwave]

Fix an incorrect colour:

Before	After

[github-actions]

	Warnings
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.
⚠️	You seem to have made changes to views. Please consider adding screenshots.

Generated by 🚫 Danger Swift against d6fe550

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[aringenbach]

LGTM

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.15 🎉

Comparison is base (dcc4ea5) 46.56% compared to head (d6fe550) 46.71%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1007      +/-   ##
===========================================
+ Coverage    46.56%   46.71%   +0.15%     
===========================================
  Files          349      349              
  Lines        22802    22802              
  Branches     12310    12310              
===========================================
+ Hits         10617    10653      +36     
+ Misses       11886    11849      -37     
- Partials       299      300       +1     

Flag	Coverage Δ
unittests	23.72% <0.00%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rces/Screens/RoomScreen/View/MessageComposer.swift	31.88% <0.00%> (ø)

... and 3 files with indirect coverage changes

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