Fix code review issues

- interfaces go to the top
- fix comma conflation
- value no generic
- optionalised props
- line lints

src/components/views/elements/ToggleSwitch.tsx

@@ -15,10 +15,21 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { EventHandler } from "react";
+import React from "react";
 import classNames from "classnames";
 import * as sdk from "../../../index";
 
+interface IProps {
+    // Whether or not this toggle is in the 'on' position.
+    checked: boolean,
+
+    // Whether or not the user can interact with the switch
+    disabled: boolean,
+
+    // Called when the checked state changes. First argument will be the new state.
+    onChange(checked: boolean): void,
+};
+
 // Controlled Toggle Switch element, written with Accessibility in mind
 export default ({checked, disabled = false, onChange, ...props}: IProps) => {
     const _onClick = () => {
@@ -45,14 +56,3 @@ export default ({checked, disabled = false, onChange, ...props}: IProps) => {
         </AccessibleButton>
     );
 };
-
-interface IProps {
-    // Whether or not this toggle is in the 'on' position.
-    checked: boolean,
-
-    // Whether or not the user can interact with the switch
-    disabled: boolean,
-
-    // Called when the checked state changes. First argument will be the new state.
-    onChange(checked: boolean): void,
-};