improv(widget): share object-select svg handle between widgets using it

src/widget/common.rs

@@ -0,0 +1,18 @@
+use crate::widget::svg;
+use std::sync::OnceLock;
+
+/// Static `svg::Handle` to the `object-select-symbolic` icon.
+pub fn object_select() -> &'static svg::Handle {
+    static SELECTION_ICON: OnceLock<svg::Handle> = OnceLock::new();
+
+    SELECTION_ICON.get_or_init(|| {
+        crate::widget::icon::from_name("object-select-symbolic")
+            .size(16)
+            .icon()
+            .into_svg_handle()
+            .unwrap_or_else(|| {
+                let bytes: &'static [u8] = &[];
+                iced_core::svg::Handle::from_memory(bytes)
+            })
+    })
+}