Et2SelectCountry: Fix limited size of search box

There was a conflict between flag style & search styles.  Now using a specific element for the current value flag instead of styling the whole slot.

api/js/etemplate/Et2Select/Et2SelectCountry.ts

@@ -42,6 +42,18 @@ export class Et2SelectCountry extends Et2StaticSelectMixin(Et2Select)
 			this.requestUpdate("select_options");
 		});
 	}
+
+	connectedCallback()
+	{
+		super.connectedCallback();
+
+		// Add element for current value flag
+		this.querySelector("[slot=prefix].tag_image")?.remove();
+		let image = document.createElement("span");
+		image.slot = "prefix";
+		image.classList.add("tag_image", "flag");
+		this.appendChild(image);
+	}
 }
 
 /**