Draft: fix(curve_dialog): changed LineEdits to SignalLineEdits

Description

Change LineEdits of curve_dialog to SignalLineEdits

Related Issues

closes #394

Type of Change

• Changed curve dialog line edits to use signal line edits

Potential side effects

@appel_c Not sure if this is bug with SignalLineEdit or CurveDialog, but the SignalLineEdit is always red even though the signal is correct. In Designer I have same problem. Can you check it?

Screenshots / GIFs (if applicable)

[Include any relevant screenshots or GIFs to showcase the changes made.]

Additional Comments

• Waveform widget works, however SignalLineEdit is always red from some reason. You can try just to run widgets/waveform/waveform_widget.py
• tests will be fixed later when the appearance of signal line edits is fixed

Definition of Done

• Documentation is up-to-date.

assigned to @wyzula_j

requested review from @appel_c

added prioritynice to have scopefrontend typebug labels

changed the description

added 5 commits

• 1831505e...d8c80293 - 3 commits from branch main
• 54598cff - fix(curve_dialog): changed LineEdits to SignalLineEdits
• 722ea2fd - fix(signal_line_edit): red painter for SignalLineEdit fixed

Compare with previous version

Hm, based on what we saw for epics motor (https://github.com/bluesky/ophyd/blob/5df3f5694f5c4c0ac049f0e601512f220e85744b/ophyd/epics_motor.py#L43)… i am tempted to vote for what we get from describe/describe_configuration… might really be much safer..