fix: don't render markers outside graph area

[leinonen]

New Pull Request

Markers renders outside graph area, which is not so nice.

Codepen that demonstrate the bug: https://codepen.io/leinonen/pen/xxaqmrX

Fixes #3320, #3562

Avoid rendering markers that are outside the graph area.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code

[rdar-lab]

Please note before attempting to merge this again. It also removed points that were exactly on the edge which we were using for specific logic. This caused a very critical bug with our system. @leinonen, I suggest having a configuration parameter for this if you would like to re-introduce this feature.