TDR: Synchronize ticks and marker

[arrlee]

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

TDR graph: Tick labels were not sync with cable end mark and/or user mark depending on the zoom level.

Issue Number: N/A

What is the new behavior?

Only TDR graph:

• Tick labels, end mark and user mark are now consistent
• Enhanced automatic calculation of tick spacing
• Enhanced label drawing with semi transparent background for better readability
• Speedup of graph drawing when lines are used: FFT points reduced from 2^14 to 2^12

Does this introduce a breaking change?

• Yes
• No

Other information