Fixed bond multiplicity assignment and other bugs, scroll on keyboard

Enter now sets element
correct return value on clickfor_template adapted to new definition,
Proton count on carbon respects charge.
Bond multiplicity is now always bond multiplicity setting/16.
Entering directory by KBD works now.
kbd auto run works now, + scroll on keyboard

Signed-off-by: Lennard Wasserthal <Wasserthal@nefkom.net>