non-collapsed colorbar in vtk pane

[ChristophNa]

Is your feature request related to a problem? Please describe.

The colorbar in the VTK pane is always collapsed after loading and only three dots are shown. You then have to actively click on the three dots to show the color bar. This is very annoying if you replace the vtkRenderWindow e.g. to show another mesh to compare it to the previous one, you cannot immediately see the change in the scalar range.

Describe the solution you'd like

I want to start with a maximized colorbar after loading. Upon clicking, it could collapse. This would require to only remove line 95 ("info_div.click()") from the file panel/models/vtk/vtklayout.ts

Describe alternatives you've considered

A more complex solution would include a switch in the vtk pane to define if the colorbar should start collapsed or maximized

[philippjfr]

@ChristophNa any chance you could make a PR with the proposed change?