Lots of repetitive text in visual shader

### Tested versions

4.3 beta1 and earlier

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 31.0.15.4633) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

This is part of `TTR()` strings, so all of this text has to be translated. The problem is that each of this strings are unique (they vary a bit at the beginning). I remember it was annoying to translate.

The text could be split into multiple strings, so the repeated parts don't need to be repeated in translation.

### Steps to reproduce

1. Open `visual_shader_editor_plugin.cpp`
2. Check `TTR()` strings in that file

### Minimal reproduction project (MRP)

N/A