Fold experiments

[mmalczak]

I have refactored the code for ease of development.
I have added independent layouts, one with widgets that cannot be folded and another one with widgets to fold.

[marmeladapk]

• Add maximum height for submit and terminate buttons
  
• Minimum width is too low when scheduler settings are hidden -
  
  
  • maybe make a single large row for recompute and load buttons
  • maybe base minimum width on parameters - this might be tricky if there are groups
• expand window to new minimum width when expanding scheduler settings (now it's expanded when moving/resizing)
  
• remember state of managment expansion
• add text next to the expansion button "expand/hide scheduler settings"

[marmeladapk]

Buttons are resized, but still the whole panel housing them scales.

Expanding and collapsing options changes the window size even if it's larger than minimum.

Minimum width seems to be the same as on upstream now regardless if settings are expanded or collapsed. I wanted to be able to make the window narrower with collapsed options.

Change text "Options" to "Scheduler settings" (it's called that elsewhere in the GUI).

[mmalczak]

Implemented

[marmeladapk]

I see what you did there with load and recompute buttons. :)

I guess that's acceptable, but you should increase minimum width for the leftmost column in arguments. With short argument names text on "load hdf" button will clip.

Resizing when expanding settings is still not there:
When you have a tall but narrow window and expand settings then it expands horizontally but shrinks vertically. It should maintain its vertical size if it's above minimum you set.

When expanding settings on short (below minimum height for expanded state) but wide window the window is not resized unless moved.

Please test how the experiment windows of different sizes behave when expanding and collapsing settings.

There's no indication that scheduler settings are not default (as per discussion on discord).

[mmalczak]

Above mentioned issues are fixed.

Indication about non-default scheduler settings will be done in #5