[466264] Enhance UX in simple installer

First version of UI redesign of simple installer mode.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=466264

Change-Id: I97e31cd19661daa557ffd7ae5bf74d29afd24751
Signed-off-by: Andreas Scharf <scharf@yatta.de>
Signed-off-by: Eike Stepper <stepper@esc-net.de>
63 files changed