Approximate the design as proposed

src/components/views/dialogs/WidgetCapabilitiesPromptDialog.tsx

@@ -126,18 +126,19 @@ export default class WidgetCapabilitiesPromptDialog extends React.PureComponent<
             >
                 <form onSubmit={this.onSubmit}>
                     <div className="mx_Dialog_content">
-                        {_t("This widget would like to:")}
+                        <div className="text-muted">{_t("This widget would like to:")}</div>
                         {checkboxRows}
-                        <LabelledToggleSwitch
-                            value={this.state.rememberSelection}
-                            toggleInFront={true}
-                            onChange={this.onRememberSelectionChange}
-                            label={_t("Remember my selection for this widget")} />
                         <DialogButtons
                             primaryButton={_t("Approve")}
                             cancelButton={_t("Decline All")}
                             onPrimaryButtonClick={this.onSubmit}
                             onCancel={this.onReject}
+                            additive={
+                                <LabelledToggleSwitch
+                                    value={this.state.rememberSelection}
+                                    toggleInFront={true}
+                                    onChange={this.onRememberSelectionChange}
+                                    label={_t("Remember my selection for this widget")} />}
                         />
                     </div>
                 </form>

src/components/views/elements/DialogButtons.js

@@ -54,6 +54,9 @@ export default class DialogButtons extends React.Component {
 
         // disables only the primary button
         primaryDisabled: PropTypes.bool,
+
+        // something to stick next to the buttons, optionally
+        additive: PropTypes.element,
     };
 
     static defaultProps = {
@@ -85,8 +88,14 @@ export default class DialogButtons extends React.Component {
             </button>;
         }
 
+        let additive = null;
+        if (this.props.additive) {
+            additive = <div className="mx_Dialog_buttons_additive">{this.props.additive}</div>;
+        }
+
         return (
             <div className="mx_Dialog_buttons">
+                { additive }
                 { cancelButton }
                 { this.props.children }
                 <button type={this.props.primaryIsSubmit ? 'submit' : 'button'}