fix: 修复组态背景图片设置

@@ -1554,6 +1554,7 @@ var BackgroundImageDialog = function (editorUi, applyFn, img, color, showColor)
 	widthInput.style.marginLeft = '8px';
 	widthInput.style.marginRight = '16px';
 	widthInput.value = (img != null && !isPageLink) ? img.width : '';
+	widthInput.setAttribute('disabled', true)
 
 	div.appendChild(widthInput);
 
@@ -1565,6 +1566,7 @@ var BackgroundImageDialog = function (editorUi, applyFn, img, color, showColor)
 	heightInput.style.marginLeft = '8px';
 	heightInput.style.marginRight = '16px';
 	heightInput.value = (img != null && !isPageLink) ? img.height : '';
+	heightInput.setAttribute('disabled', true)
 
 	div.appendChild(heightInput);
 	mxUtils.br(div);