[Accessibility] - More clear description of palette objects

Today, when I brose the line palette, I found a problem, which is then checked for other palettes. There are lots of items with different variations, but the descriptions are all the same. E.g., there are 6 lines all named "pedal", and as a blind, I can't distinguish them at all. With my mother's help, I made the following, which can be a start point for all other objects such as arpeggios. These 6 pedal lines should be:
1. pedal symbols and line
2,. pedal symbols only
3. pedal bracket hooks both sides vertical
4. pedal bracket hooks right side slanted
5. pedal bracket hooks both sides slanted
6. pedal bracket hooks left side slanted

For other things like arpeggios, stating clearly up, down, arrow, guitar or other types. This will help both blind musicians and amateurs to correctly read and input the corresponding symbols and lines.

Regards,
Haipeng