[BUG] - Trace Live Data Overflow error

[zdomke]

Describe the bug

The leftmost data in the live data buffer is deleted and the curve just draws a direct line from the archive data to the live data.

Expected behavior

When a trace’s live data overflows, it should not be deleted. Instead it should be appended to the rightmost side of the archive data buffer, keeping it available for the user.

Steps to Reproduce

1. Pick a PV that triggers very often
2. Plot it on trace
3. Notice that very quickly, the live data buffer will start to disappear

Possible solution (optional)

No response

My platform

No response

Additional context