Doc + little CSS adjustement

frontend/src/pages/recipe_edit.rs

@@ -22,7 +22,13 @@ use crate::{
 pub fn setup_page(recipe_id: i64) {
     // Title.
     {
-        let title: HtmlInputElement = by_id("input-title");
+        // Here we check if the first element exists,
+        // if not, the recipe edit page hasn't been loaded
+        // and we return from the function without panicking.
+        let title = match document().get_element_by_id("input-title") {
+            Some(e) => e.dyn_into::<HtmlInputElement>().unwrap(),
+            None => return,
+        };
 
         // Check if the recipe has been loaded.