Fixing set_font_family to not be sticky

CHANGELOG.md

@@ -86,6 +86,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   that was incorrectly being applied to the lightness contrast calculation. In
   short, this function should be much more accurate in perceived contrast
   evaluation.
+- `Graphics::set_font_family` now clears the cached font family list, ensuring
+  that the next call to apply_current_font_settings works correctly.
 
 ### Changed
 

src/graphics.rs

@@ -66,6 +66,12 @@ impl<'clip, 'gfx, 'pass> Graphics<'clip, 'gfx, 'pass> {
         )
     }
 
+    /// Sets the current font family.
+    pub fn set_font_family(&mut self, family: cosmic_text::FamilyOwned) {
+        self.font_state.current_font_family = None;
+        self.renderer.set_font_family(family);
+    }
+
     /// Returns the first font family in `list` that is currently in the font
     /// system, or None if no font families match.
     pub fn find_available_font_family(&mut self, list: &FontFamilyList) -> Option<FamilyOwned> {