Based on feedback, collecting here so it doesn't get lost.
Filter view
[x] don't sort filters while typing the name
[x] allow sorting filters on other parameters (not only name)
[x] when adding a new filter, place it at the bottom
Config/coeff management
[x] show file date in config file listing
[x] a button to start a new config from the default
[x] add an indication for when the GUI has unsaved changes
[x] dynamically update tooltip on "Apply to DSP" button to clarify if config will be saved to file or not
[x] add an indicator for if the GUI and the DSP configs are in sync or not
[x] let gui show when backend is configured to support setting active config
Plotting
[x] allow saving filter plots to file
[x] allow saving plot data to csv
[x] plot group delay
[x] proper plotting of delay filters, with subsample delay
[x] add a way to open a larger view of a filter plot
[x] optionally show filter steps or expand to individual filters in pipeline plot
Various
[x] allow saving the pipeline view to file
[x] add new tab for the functions that currently only exist in compact mode
[x] extend range of level meters, make scale finer towards 0 dB
Investigate/discuss
[x] should "Apply to DSP" save to file? No!
[x] separate into three buttons, "apply to DSP", "save to active file", "apply&save".
Postponed to a later version
[ ] plotting tool for response of entire pipeline, for a choice of input and output channels.
[ ] button for clearing clipped samples counter
[ ] group pipeline view into sections for each mixer (and capture device). This is to help users keep track of the channel mapping at each stage in the pipeline.
Based on feedback, collecting here so it doesn't get lost.
Filter view
Config/coeff management
Plotting
Various
Investigate/discuss
Postponed to a later version