This reverts commit b1bcff6f.

Do no use '_' for compatibility with Micropython binding.

It's resolved to LV_ALIGN_TOP_LEFT/RIGHT according to the based direction

- Changed all text based instances of LVGL to uppercase (Only instances referring to LVGL the project, not instances referring to the ‘lvgl’ directory structure in the repository, or in URL links)
- Standardized bulleted/numbered list capitalization and punctuation
- Fixed several typos and spelling errors
- Changed minor grammatical errors and structure for clarity.