core: fix the bin directory during project creation

Our project setup depends on the bin directory being the
output location for the src directory.
Previously the user could change this directory during
project setup. He can always change it later on if he
desires so.

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
core: preferences i18n

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>