[frogend] Emoji categories (#1051)

* emoji category combobox

* emoji categorizing

* dropdown entry separation

* emoji filtering/sorting

* add some explaining comments

* remove unneeded default-value code

* remove wrongly created package.json

* configurable ComboBox label+placeHolder

web/source/settings/components/combo-box.jsx

@@ -0,0 +1,49 @@
+/*
+	GoToSocial
+	Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+"use strict";
+
+const React = require("react");
+
+const {
+	Combobox,
+	ComboboxItem,
+	ComboboxPopover,
+} = require("ariakit/combobox");
+
+module.exports = function ComboBox({state, items, label, placeHolder}) {
+	return (
+		<div className="form-field combobox-wrapper">
+			<label>
+				{label}
+				<Combobox
+					state={state}
+					placeholder={placeHolder}
+					className="combobox input"
+				/>
+			</label>
+			<ComboboxPopover state={state} className="popover">
+				{items.map(([key, value]) => (
+					<ComboboxItem className="combobox-item" key={key} value={key}>
+						{value}
+					</ComboboxItem>
+				))}
+			</ComboboxPopover>
+		</div>
+	);
+};