Create Settings Page

[SkylerBurger]

As a user, I want to click on the settings gear to view and modify the current setting of my New Tab Dialer

A settings gear icon is already present within the Group Tabs navigation bar. When the settings gear is clicked the page should re-render showing application-level (not dial group-level) settings for the application.

To start please add the following basic functionality to the newly rendered Settings page:

• Input field that shows the current config URL is present in the config.
• A sync button that wipes the dialer-config from localStorage and overwrites it with the config retrieved during the sync. Add a later ticket to create a warning pop-up if you don't add it as part of this ticket.

[SkylerBurger]

This issue was address with PR #13