History of generated passwords (#310)

* Save last 5 passwords.

* Move password history to seperate page.

* Use the util helpers for accessing the local storage.

* Change close to back for password history. Remove unused html.

* Change orderBy to use the date instead of magic array.

* Move historyService to background.

* Add passwords generated from shortcut and contextmenu to history.

* Fix return to edit/add not working in password generator history.

* Change password icon to clipboard.

* Change link to password history to use on-click.

* Clear password generator history on logout.

* Code style fix.

* Add new .wrap class for wrapping long text. Fix password icon.

src/popup/less/components.less

@@ -428,6 +428,10 @@
             }
         }
 
+        &.wrap {
+            overflow-wrap: break-word;
+        }
+
         input:not([type="checkbox"]), select, textarea {
             border: none;
             width: 100%;