change method of hiding flag input

gulp/res/css/style.css

@@ -904,9 +904,10 @@ input:invalid, textarea:invalid {
 	height: 22px;
 }
 
-#selected-flag {
+#selected-flag[src^='/'] {
 	border: 1px solid var(--post-outline-color);
 	height: 22px;
+	width: 32px;
 }
 
 .board-description {

gulp/res/js/forms.js

@@ -125,9 +125,7 @@ class formHandler {
 
 	updateFlagField() {
 		if (this.customFlagInput) {
-			const flagSrc = this.customFlagInput.options[this.customFlagInput.options.selectedIndex].dataset.src || '';
-			this.selectedFlagImage.src = flagSrc;
-			this.selectedFlagImage.style.width = flagSrc ? '32px' : '0px';
+			this.selectedFlagImage.src = this.customFlagInput.options[this.customFlagInput.options.selectedIndex].dataset.src || '';
 		}
 	}