Missing scalar uniform hints in visual shaders

[dweremeichik]

Godot version

v3.4.stable.official [206ba70]

System information

N/A

Issue description

When writing shaders by hand, or converting from Spatial Materials, scalar uniform hints can be used. An example might be:

uniform float roughness : hint_range(0,1);
uniform float point_size : hint_range(0,128);

However when using visual shaders, there is no way to specify uniform hints.

Steps to reproduce

1. Create a visual shader.
2. Create a scalar uniform in the visual shader.
3. View shader params - no hint available.

Minimal reproduction project

No response

[Chaosus]

This was implemented in 4.0, but porting back seems demanded.

[Chaosus]

Fixed in #56466