Qorenext Plugin Checker

This extension intends to check whether the "x-frame headers" plugin is already installed.

If the plugin mentioned is not installed, this will allow the user to install "x-frame headers" by providing a hyperlink to the extension's home page.

Regardless of the installation status, it will store values in the local storage to provide webpages the installation status of the said extension.

Keys stored in the localstorage:
- isIframePluginInstalled: 'true' if the plugin is installed.
- isIframePluginEnabled: 'true' if the plugin is installed and enabled.

This plugin is intended to be used for the Qore Application:
https://qorenext-app.azurewebsites.net/