Feature/cleanup files (#528)

* Move menu components into new dir

* Move chapter components into new dir

* Extract menu helper functions

* Move "SelectionFAB" to "collection" dir

* Move debounce hook to global utils dir

* Rename manga "hooks" to "useRefreshManga"

src/components/menu/MenuItem.tsx

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import { ListItemIcon, ListItemText, MenuItem as MuiMenuItem } from '@mui/material';
+import { OverridableComponent } from '@mui/material/OverridableComponent';
+import { SvgIconTypeMap } from '@mui/material/SvgIcon/SvgIcon';
+
+interface IProps {
+    title: string;
+    Icon: OverridableComponent<SvgIconTypeMap> & { muiName: string };
+    onClick: () => void;
+    isDisabled?: boolean;
+}
+
+export const MenuItem = ({ onClick, title, Icon, isDisabled }: IProps) => (
+    <MuiMenuItem onClick={onClick} disabled={isDisabled}>
+        <ListItemIcon>
+            <Icon fontSize="small" />
+        </ListItemIcon>
+        <ListItemText>{title}</ListItemText>
+    </MuiMenuItem>
+);