fix: tabs: renderFavicon: check if imgEl.style is there

got `can't access property "display", imgEl.style is undefined` error
after dnd tab to another window

Author: mbnuqw

src/services/tabs.fg.actions.ts

@@ -2954,7 +2954,7 @@ export function renderFavicon(tab: Tab) {
     // Set img
     imgEl.src = tab.favIconUrl
     // Show img
-    imgEl.style.display = 'block'
+    if (imgEl.style) imgEl.style.display = 'block'
     // Hide svg
     if (svgUseEl?.parentElement) svgUseEl.parentElement.style.display = 'none'
   } else if (svgUseEl?.parentElement) {