This change to avoid conflict with `outline` method in Button.
## Break changes:
- The `outline` method in `StyledExt` now renamed to `focused_border`.
This is useless, we can just use `gpui::prelude`, so I removed it.
## Break changes
- The `ui::prelude` has been removed, you can replace by use
`gpui::prelude`.
Close#579
- Leave some space before the Input to support mouse down to position
cursor at start of line.
- Fix to match with size appearance.
- Keep padding left and right to Input, even setup `appearance: false`.
## Break Changes
- The `xlarge`, `large`, `small`, `xsmall` ... method has been moved to
use `ui::Sizable` trait to same as other component.
- Add `mix` method to mix two color.
- Export `ui::theme::*` to crate root, before `use
ui:theme::ActiveTheme` to `use ui::ActiveTheme`.
## Break Changes
- Moved `ui::theme::Colorize` to `ui::Colorize`.
- Merged `ColorExt` to `Colorize`.
- Renamed `to_hex_string` to `to_hex`, `parse_hex_string` to
`parse_hex`.