[Terrain Tool] Different property fields are overlapping in Brush Mask Filter.

In Paint terrain, under the Brush mask Filter, different Brush Mask Filters property fields overlap.
In the Aspect brush mask filter, "Strength" and "feature Size" properties overlap. In similar way property fields of Blur, Concavity, height, slope, Remap Brush Mask Filters are overlapping.

Steps to Repro:
1. Create a new Project
2. Add package Terrain Tool 4.0.0
3. Create new Terrain
4. Inspector > Paint Terrain > Sculpt > Bridge
5. Brush mask Filters > add > Blur
6. Observe Amount and Direction fields are overlapping with each other.

Expected Result: Property fields are well separated

Actual Result: Property fields are overlapping in Brush Mask Filter.

Reproducible in: 2021.2.0a19, 2020.3.11f1, 2019.4.28f1 with the package version 4.0.0 Pre 2 RC, 3.0.2 pre.3, 3.0.1 pre, 3.0.0 pre 2.0.0.pre

Environment: Windows 10 and macOS 11.3

Note: Brush Mask Filter introduced in package version 2.0.0 pre