Labs: Rich-text editor - Fix text formatting switch losing the current content of the composer

[aringenbach]

Fixes #7054

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Base: 11.72% // Head: 11.81% // Increases project coverage by +0.08% 🎉

Coverage data is based on head (46c3dc4) compared to base (2184f1f).
Patch coverage: 76.11% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7055      +/-   ##
===========================================
+ Coverage    11.72%   11.81%   +0.08%     
===========================================
  Files         1613     1613              
  Lines       158529   158430      -99     
  Branches     64369    64341      -28     
===========================================
+ Hits         18589    18712     +123     
+ Misses      139305   139082     -223     
- Partials       635      636       +1     

Flag	Coverage Δ
uitests	54.60% <76.11%> (+0.12%)	⬆️
unittests	6.08% <0.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
...tSwiftUI/Modules/Room/Composer/View/Composer.swift	84.39% <76.11%> (+3.49%)	⬆️
...ojiPicker/Data/EmojiMart/EmojiItem+EmojiMart.swift	95.65% <0.00%> (+0.30%)	⬆️
Riot/Modules/MatrixKit/Models/Account/MXKAccount.m	13.51% <0.00%> (+0.38%)	⬆️
...UserSessions/Common/View/UserSessionCardView.swift	53.23% <0.00%> (+1.58%)	⬆️
...herSessions/MockUserOtherSessionsScreenState.swift	100.00% <0.00%> (+2.90%)	⬆️
...view/View/UserSessionListItemViewDataFactory.swift	92.53% <0.00%> (+5.21%)	⬆️
...SessionOverview/UserSessionOverviewViewModel.swift	61.53% <0.00%> (+8.01%)	⬆️
...odules/Room/Composer/MockComposerScreenState.swift	93.33% <0.00%> (+8.88%)	⬆️
...Sessions/Common/View/UserSessionCardViewData.swift	86.84% <0.00%> (+11.54%)	⬆️
... and 14 more

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