Rework layout for smaller screens about opn2bankeditor

[Wohlstand]

Just a local experiment. For extra non-FM setup, I have an idea on a separate branch to use separated tabs for them. For the FM setup layout it needs to give more compact combination of label+control.

[Wohlstand]

🤔

[freq-mod]

🤔

[Wohlstand]

The main reason to use smaller fonts on smaller screens 🤔
Anyway, one another reason to make a different layout (horizontal only, not cubic) to avoid the hell on smaller screens...

[freq-mod]

make a different layout

TBH, thought about the same. Incompatibility with smaller screen aside, current one isn't flexible enough. YM2612 may be fine, but when thinking about full YM2608 (Wohlstand/libOPNMIDI#94), it won't lead anywhere - in addition to FM, there is a built-in PSG, wildly different than the one used in Mega Drives (hw and sw envelopes, noise + tone mixing on a single channel, non square waveforms, SSG-EG), ADPCM channel that's much more powerful than 2612's pathetic channel 6 output and there must be an option screen for all permutations of sound synthesis (FM + PCM, PSG + FM/2608 Rhythm, pseudo 8-op, etc...)

Home screen for OPN chip type selection, tabs for each synthesis type and BambooTracker or Deflemask-inspired instrument editor might be not the worst idea 🤷‍♂️

[freq-mod]

FM setup layout it needs to give more compact combination of label+control.

Maybe short, 2~4 letter abbreviation of parameter labels (AR instead of Attack, MULT instead of Frequency Multiplication) and spinbox control? For description of parameter, mouse-hover can be used, like now

[freq-mod]

Is the horizontal layout still being worked on? Using bank editors is a bit of a problem (at least on Linux, much less so on Windows) with small screen device and I can't find any way to resize the window or reduce a font size.
Changing lines 12 and 13 of bank_editor.ui didn't change anything:
<width>973</width>
<height>748</height>

[Wohlstand]

I didn't complete this yet, at least, I need to tune some. Until that, you have a workaround: try to reduce the font size in your settings, that should also reduce the size of controls

[freq-mod]

Did just that, didn't help. Font size of texts in BE isn't affected by fonts' system settings.
Under Linux Mint, top of the window is off-screen - everything above "instrument list" is invisible, including menu bar.