1.2.7

1. mouse on the control, tooltips appear.
2. When setting Keybind, you can no longer set the same key consecutively. (e.g. LeftShift + LeftShift) This is an intentional limitation to prevent misbehavior, and DeleteNewline forces two keybind settings.
3. Fixed warning message when entering the Settings page.
4. minimum window size has been reduced to (650, 365).
5. version information is now displayed on the bottom right of the Setting page.
6. icon has been changed to be identifiable even in light mode.
7. program name in the title bar changed to "Delete Newline" instead of "DeleteNewline".