* View text and code cleanup
* Typo fix
* Fixed case generation
* check list fixed
* Horizontal clipping fixed
* Lost letter fixed.
* Cleanup
* Unified implementation (Rotory button support)
* Fixed USB menu issue and RTN button.
* Rotary encoder acceleration implemented
* Do not close file on every line read
* Sliding window implemented. File size limitations practically removed.
* scrollbar implemented
* Cleanup & scroll bar adjustment
* Cleanup
* Smoother scrolling for long lines.
* Minor cleanup
