Installer - Multiple screens creates a need for "<Prev" and "Next>" buttons

Installer: 0.0.2-20160406-56

In the latest installer, the user selects the installation directory on the first screen, and selects the components to be installed on a second screen.

After the user selects the installation directory and proceeds to the 2nd screen, he/she is not able to "go back" to the first screen to change the install directory.