Fix timeline items text height calculation

[stefanceriu]

vs.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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0 Security Hotspots
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No Coverage information
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[github-actions]

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[codecov-commenter]

Codecov Report

Merging #6702 (b0a3777) into develop (d7ab536) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff            @@
##           develop    #6702   +/-   ##
========================================
  Coverage     9.88%    9.88%           
========================================
  Files         1474     1474           
  Lines       149841   149841           
  Branches     60504    60505    +1     
========================================
  Hits         14810    14810           
  Misses      134480   134480           
  Partials       551      551           

Impacted Files	Coverage Δ
...ules/MatrixKit/Models/Room/MXKRoomBubbleCellData.m	16.14% <0.00%> (ø)

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[ismailgulek]

LGTM!