New options
- [Feature] New option: doom-modeline-battery.
- [Feature] New option: doom-modeline-highlight-modified-buffer-name.
- [Feature] Different color indicators for various modal modes.
- [Feature] Status indicator for active compilation buffer.
- [Feature] Define calculator mode-line.
- [Feature] New option: doom-modeline-modal.
- [Feature] Support helm-ag.
- [Feature] Add option to make segments visible in inactive windows.
- Bug fixes and improvements.