[Dark] Database tables in editor tab have little contrast

**Describe the bug**
As seen in the example, the contrast is low.

**To Reproduce**
Steps to reproduce the behavior:
1. Connect to a database (PostgreSQL or SQLite)
2. Open  a table

**Screenshots**
<img width="946" alt="image" src="https://user-images.githubusercontent.com/24817039/181781720-bdc9e304-fbbe-469e-81a4-6affc21fb85b.png">


**Application:**
PyCharm 2022.1.3