SVG Borders - stage 1 and stage 2

[aninde]

Testing SVG borders

First stage

• Testing PR Improve custom borders performance (SVG) handsontable#6157
• Testing checklist Rewrite custom borders to use SVGs insead of DIVs handsontable#6467

Second stage - retest and regression tests

Testing bugs found in the first stage
Two PRs:

• SVG borders: Respond to dynamic changes in selection border col… handsontable#6593 (SVG borders: Respond to dynamic changes in selection border color and width)

  Builds:
  .css
  https://gist.githack.com/aninde/0616665053abd68b24df768c9d061084/raw/01f332ad7a3df7575d248577310419fe35536b6a/handsontable.full.min.css
  .js
  https://gist.githack.com/aninde/d78aa1e84304254cda4629f7b5673d40/raw/3668a12334e82f4dd18e9cb4a0ca1d0a42980c64/handsontable.full.min.js

• SVG borders: refactor Overlay classes, fix fast scrolling handsontable#6594 (SVG borders: refactor Overlay classes, fix fast scrolling)

  Builds:
  .css
  https://gist.githack.com/aninde/ee118a4a6edf7e10baa31b2a9fdff0a3/raw/7d3a1b7fe55021ade6a3ed82eeacb8183696fd9e/handsontable.full.min.css
  .js
  https://gist.githack.com/aninde/263e58cf59ef82153cb28b3f51c866f0/raw/9fc1643fb42ea23d1629c747bbe2ccfa65a082a7/handsontable.full.min.js

Found bugs

• 1. #6627 [8.0.0-svg-PR#6593] colors order on fixed borders
• 2. #6628 [8.0.0-svg] selection, fill and autoFill covers fixedBorder or frozen-border
• 3. #6626 Cell selection on print
• 4. #6639 [8.0.0-svg] Introduce "Frozen line" to mark the edge of fixed rows/columns

Discussion

• SVG borders: refactor Overlay classes, fix fast scrolling handsontable#6594 (comment) - or maybe bug?

Third stage

was moved to separate issue #8

How it was tested?

Locally and with demos
https://jsfiddle.net/aninde/4zkrvqgs/ - stage 1 v.
WIP

[aninde]

This stage is closed. Amendments will be created on joint PR in accordance with handsontable/handsontable#6593 (comment). Further works will be in the stage 3 #8