Added angle property for label widget (#209)

* Added angle property for label widget

* Update src/widgets/widget_definitions.rs

Co-authored-by: ElKowar <5300871+elkowar@users.noreply.github.com>

src/widgets/widget_definitions.rs

@@ -501,6 +501,10 @@ fn build_gtk_label(bargs: &mut BuilderArgs) -> Result<gtk::Label> {
         // @prop wrap - Wrap the text. This mainly makes sense if you set the width of this widget.
         prop(wrap: as_bool) {
             gtk_widget.set_line_wrap(wrap)
+        },
+        // @prop angle - the angle of rotation for the label (between 0 - 360)
+        prop(angle: as_f64 = 0) {
+            gtk_widget.set_angle(angle)
         }
     });
     Ok(gtk_widget)