LV2 generic GUI not ideal, no file loading support

[lokkiikkol]

Describe the bug
i am trying to use the x42 lv2 midi plugins on element (OS X)
To Reproduce
load a lv2 midi plugin from x42, those plugins have no GUI, just the generic lv2 GUI. most of those plugins require to enter whole numbers (midi note or cc values), a task seemingly impossible with the sliders that element displays a GUI.

there is at least one plugin by x42 (https://github.com/x42/midimap.lv2) that requires loading of an external config file, as of now there does not seem to be a file handler in lv2 element...
Expected behavior
it would be great to have the option to enter a value via keyboard instead of a slider. and a file open handler would be very nice as well.
Screenshots

Desktop (please complete the following information):

• OS: OSX
• Version 10.15.7

Standalone or Plugin
Standalone

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[mfisher31]

Thanks for the heads up. Will get this done in JLV2 for 0.47, or earlier if it turns out to be an easy fix.