fix: Empty session added on toggling add session

[iamareebjamal]

Fixes #4575

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[codecov]

Codecov Report

Merging #4581 into development will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           development    #4581      +/-   ##
===============================================
- Coverage        22.28%   22.27%   -0.01%     
===============================================
  Files              474      474              
  Lines             4985     4987       +2     
  Branches             8        8              
===============================================
  Hits              1111     1111              
- Misses            3873     3875       +2     
  Partials             1        1              

Impacted Files	Coverage Δ
app/components/forms/session-speaker-form.js	0.00% <0.00%> (ø)

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