Ensure that footer is updated in footer settings menu on removal

Update

Author: Bjoern Kerler

Diff for: src/gui/footer/footer_line.cpp

@@ -44,10 +44,17 @@ bool FooterLine::Create(footer::Item item_id, size_t index) {
 
     auto &item = items[index];
 
-    const bool result = [&]<typename... Rec>(TypeList<Rec...>) -> bool {
+    if (item_id == footer::Item::none) {
+        items[index].emplace<std::monostate>();
+        return false;
+    }
+
+    bool result = [&]<typename... Rec>(TypeList<Rec...>) -> bool {
         return (((item_id == Rec::item && !std::holds_alternative<typename Rec::T>(item)) ? item.emplace<typename Rec::T>(this), true : false) || ...);
     }(footer::FooterItemMappings());
 
+    result |= (item_id == footer::Item::none && std::holds_alternative<std::monostate>(item) ? item.emplace<std::monostate>(), true : false);
+
     if (result) {
         positionWindows();
     }