HARP-6703 Fix copying across images

[nzjony]

Fix missing function.

[codecov]

Codecov Report

Merging #1666 into master will increase coverage by 0.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1666      +/-   ##
==========================================
+ Coverage   62.73%   62.95%   +0.22%     
==========================================
  Files         278      278              
  Lines       25062    25062              
  Branches     5656     5656              
==========================================
+ Hits        15722    15779      +57     
+ Misses       9340     9283      -57     

Impacted Files	Coverage Δ
...here/harp-mapview/lib/text/TextElementsRenderer.ts	69.56% <0.00%> (+1.08%)	⬆️
@here/harp-mapview/lib/MapView.ts	65.97% <0.00%> (+1.31%)	⬆️
@here/harp-mapview/lib/VisibleTileSet.ts	79.00% <0.00%> (+1.65%)	⬆️
...ere/harp-mapview/lib/composing/LowResRenderPass.ts	44.23% <0.00%> (+3.84%)	⬆️
@here/harp-mapview/lib/CameraMovementDetector.ts	90.14% <0.00%> (+28.16%)	⬆️

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[nzjony]

@harpgl-bot retest this please