remove old index_offset code, fix popup_list initial index being offscreen

sphaira/include/ui/menus/ghdl.hpp

@@ -68,7 +68,6 @@ private:
 private:
     std::vector<Entry> m_entries;
     s64 m_index{};
-    s64 m_index_offset{};
     std::unique_ptr<List> m_list;
 };
 

sphaira/include/ui/popup_list.hpp

@@ -36,7 +36,6 @@ private:
     Items m_items;
     Callback m_callback;
     s64 m_index; // index in list array
-    s64 m_index_offset{}; // drawing from array start
 
     std::unique_ptr<List> m_list;
 

sphaira/include/ui/sidebar.hpp

@@ -13,7 +13,6 @@ public:
 
 protected:
     std::string m_title;
-    Vec2 m_offset{};
 };
 
 class SidebarEntryBool final : public SidebarEntryBase {
@@ -117,7 +116,6 @@ private:
     Side m_side;
     Items m_items;
     s64 m_index{};
-    s64 m_index_offset{};
 
     std::unique_ptr<List> m_list;