add new-styled button

might merge it later on with accessible button

res/css/_components.scss

@@ -91,6 +91,7 @@
 @import "./views/elements/_ErrorBoundary.scss";
 @import "./views/elements/_EventListSummary.scss";
 @import "./views/elements/_Field.scss";
+@import "./views/elements/_FormButton.scss";
 @import "./views/elements/_IconButton.scss";
 @import "./views/elements/_ImageView.scss";
 @import "./views/elements/_InlineSpinner.scss";

res/css/views/elements/_FormButton.scss

@@ -0,0 +1,31 @@
+/*
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_FormButton {
+    line-height: 16px;
+    padding: 5px 15px;
+    font-size: 12px;
+
+    &.mx_AccessibleButton_kind_primary {
+        color: $accent-color;
+        background-color: $accent-bg-color;
+    }
+
+    &.mx_AccessibleButton_kind_danger {
+        color: $notice-primary-color;
+        background-color: $notice-primary-bg-color;
+    }
+}

src/components/views/elements/FormButton.js

@@ -0,0 +1,27 @@
+/*
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import AccessibleButton from "./AccessibleButton";
+
+export default function FormButton(props) {
+    const {className, label, kind, ...restProps} = props;
+    const newClassName = (className || "") + " mx_FormButton";
+    const allProps = Object.assign({}, restProps, {className: newClassName, kind: kind || "primary", children: [label]});
+    return React.createElement(AccessibleButton, allProps);
+}
+
+FormButton.propTypes = AccessibleButton.propTypes;