1. [Feature] Fix #202: Be compatible with delight.
2. [Feature] Fix #203: Add custom faces for the LSP icon.
3. Remove the advice of fill-paragraph.
4. Optimize: faster to render icons.
5. Fix #200: Helm mode line is mixedly active/inactive when previewing a line.
6. Rename doom-modeline--default-mode-line to doom-modeline--old-format.
7. Refactor.