Extract reboot button from reForis.

* Add RebootButton tests.
 * RebootButton code review.
 * Update translations.

src/common/__tests__/RebootButton.test.js

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+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from "react";
+
+import { fireEvent, getByText, queryByText, render, wait } from "customTestRender";
+import mockAxios from "jest-mock-axios";
+import { mockJSONError } from "testUtils/network";
+import { mockSetAlert } from "testUtils/alertContextMock";
+
+import { RebootButton } from "../RebootButton";
+
+describe("<RebootButton/>", () => {
+    let componentContainer;
+    beforeEach(() => {
+        const { container } = render(<>
+            <div id="modal-container"/>
+            <RebootButton/>
+        </>);
+        componentContainer = container;
+    });
+
+    it("Render.", () => {
+        expect(componentContainer)
+            .toMatchSnapshot();
+    });
+
+    it("Render modal.", () => {
+        expect(queryByText(componentContainer, "Confirm reboot"))
+            .toBeNull();
+        fireEvent.click(getByText(componentContainer, "Reboot"));
+        expect(componentContainer)
+            .toMatchSnapshot();
+    });
+
+    it("Confirm reboot.", () => {
+        fireEvent.click(getByText(componentContainer, "Reboot"));
+        fireEvent.click(getByText(componentContainer, "Confirm reboot"));
+        expect(mockAxios.post)
+            .toHaveBeenCalledWith("/reforis/api/reboot", undefined, expect.anything());
+    });
+
+    it("Hold error.", async () => {
+        fireEvent.click(getByText(componentContainer, "Reboot"));
+        fireEvent.click(getByText(componentContainer, "Confirm reboot"));
+        mockJSONError();
+        await wait(() => expect(mockSetAlert)
+            .toBeCalledWith("Reboot triggering was failed."));
+    });
+
+});

src/common/__tests__/__snapshots__/RebootButton.test.js.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`<RebootButton/> Render modal. 1`] = `
+<div>
+  <div
+    id="modal-container"
+  >
+    <div
+      class="modal fade show"
+      role="dialog"
+    >
+      <div
+        class="modal-dialog modal-dialog-centered"
+        role="document"
+      >
+        <div
+          class="modal-content"
+        >
+          <div
+            class="modal-header"
+          >
+            <h5
+              class="modal-title"
+            >
+              Reboot confirmation
+            </h5>
+            <button
+              class="close"
+              type="button"
+            >
+              <span
+                aria-hidden="true"
+              >
+                ×
+              </span>
+            </button>
+          </div>
+          <div
+            class="modal-body"
+          >
+            <p>
+              Are you sure you want to restart the router?
+            </p>
+          </div>
+          <div
+            class="modal-footer"
+          >
+            <button
+              class="btn btn-primary "
+              type="button"
+            >
+               
+               
+              Cancel
+            </button>
+            <button
+              class="btn btn-danger"
+              type="button"
+            >
+               
+               
+              Confirm reboot
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+  <button
+    class="btn btn-danger"
+    type="button"
+  >
+     
+     
+    Reboot
+  </button>
+</div>
+`;
+
+exports[`<RebootButton/> Render. 1`] = `
+<div>
+  <div
+    id="modal-container"
+  />
+  <button
+    class="btn btn-danger"
+    type="button"
+  >
+     
+     
+    Reboot
+  </button>
+</div>
+`;