Implemented UI for Accounts applications management.

Introduced copy service and injected it usage into auth finish page.
Introduced Collapse component.
Introduced Radio component.
Generalized Checkbox component to share Radio component styles.
Improved Textarea component: it now has auto height functionality.
Improved profile/BackButton component: now you can pass custom url.
BSOD is no longer displayed on 404 response.

src/pages/dev/CreateNewApplicationPage.js

@@ -0,0 +1,71 @@
+// @flow
+import React, { Component } from 'react';
+
+import { FormModel } from 'components/ui/form';
+
+import ApplicationForm from 'components/dev/apps/applicationForm/ApplicationForm';
+
+import oauth from 'services/api/oauth';
+import { browserHistory } from 'services/history';
+
+import type {OauthAppResponse} from 'services/api/oauth';
+
+const app: OauthAppResponse = {
+    clientId: '',
+    clientSecret: '',
+    countUsers: 0,
+    createdAt: 0,
+    type: '',
+    name: '',
+    description: '',
+    websiteUrl: '',
+    redirectUri: '',
+    minecraftServerIp: '',
+};
+
+export default class CreateNewApplicationPage extends Component<{}, {
+    type: ?string,
+}> {
+    static displayName = 'CreateNewApplicationPage';
+
+    state = {
+        type: null,
+    };
+
+    form = new FormModel();
+
+    render() {
+        return (
+            <ApplicationForm
+                form={this.form}
+                displayTypeSwitcher
+                onSubmit={this.onSubmit}
+                type={this.state.type}
+                setType={this.setType}
+                app={app}
+            />
+        );
+    }
+
+    onSubmit = async () => {
+        const { form } = this;
+        const { type } = this.state;
+        if (!type) {
+            throw new Error('Form was submitted without specified type');
+        }
+
+        form.beginLoading();
+        const result = await oauth.create(type, form.serialize());
+        form.endLoading();
+
+        this.goToMainPage(result.data.clientId);
+    };
+
+    setType = (type: string) => {
+        this.setState({
+            type,
+        });
+    };
+
+    goToMainPage = (hash?: string) => browserHistory.push(`/dev/applications${hash ? `#${hash}` : ''}`);
+}