[Update] Combine in one window. Rename Main/Config Window to Main/Config Page accordingly.

For now, I put Config Page to below the main page temporary. Open Config Button does not work.

src-ui/app/config_page/setting_section/SettingSection.module.scss

@@ -0,0 +1,9 @@
+.scroll_container {
+    width: 100%;
+    overflow-y: auto;
+    overflow-x: hidden;
+}
+
+.container {
+    margin: 6rem 4rem 16rem 3.2rem;
+}