Clean up application selection/install page.

[Fezzy976]

Just a small idea to improve IQ and readability on the main application page. When first opened it always needs manaually resizing, and the text becomes really small. It can also be quite daunting for newer users that are first greeted with a huge block of text.

My ideas are simply to collapse the categories with drop down arrows next to each one. This way people are greeted with only the categories and they can easily browse them one by one.

Also a font size/colour/zoom(magnify) option would also help for people with difficulty reading or seeing certain colours.

I am no programmer and wouldn't know where to start issuing pull requests. This is just an idea to help make this awesome app better for more people.

Thanks :)