Add hints to AppDrawer for easier guidance to each icon's role

[nabenabe0928]

Feature Request

The current version does not show anything when the mouse hovers over these icons and I know that the hints will be shown when the three-line icon above.
However, I still would like to have the hints when the mouse comes to the corresponding icons.
To achieve that, we simply need to add title to each ListItem in AppDrawer.tsx.