Fixed issues with Fast template logo alignment

[philippjfr]

Fixes #2184

[codecov]

Codecov Report

Merging #2469 (146e81f) into master (668fad3) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2469      +/-   ##
==========================================
- Coverage   83.28%   83.27%   -0.01%     
==========================================
  Files         184      184              
  Lines       23081    23080       -1     
==========================================
- Hits        19222    19221       -1     
  Misses       3859     3859              

Impacted Files	Coverage Δ
panel/tests/pane/test_plotly.py	98.10% <0.00%> (-0.64%)	⬇️
panel/pane/idom.py	27.40% <0.00%> (+0.20%)	⬆️

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