* fix arrow labels resizing
- min arrow labels width based on font size
- labels width and padding in % of container's width
- resize labels simply multiplying by scale
* remove no longer needed getContainerDims
* fix arrow labels font size not updated on change font size action
* fix bound arrows not updated right after resize
* fix test
* fix 3+ point arrow label resizing with shift
* fix bound text not scaling when resizing with shift & n or s handle
* fix arrow labels width not updating when moving a 2-point arrow point with shift
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Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>