Thanks to `impl From<bool> for Vec2b` one can now shorten some builder
calls, like:
Previous:
```rust
egui::ScrollArea::vertical()
.auto_shrink([false; 2])
```
New:
```rust
egui::ScrollArea::vertical()
.auto_shrink(false)
```
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|---|---|---|
| .. | ||
| src | ||
| Cargo.toml | ||
| README.md | ||
| screenshot.png | ||
