extract amount of dropped weapon stack
remove some unused variables, comments
display amount of stack to be dropped
astyle main_menu.cpp
check if reading an item of type it_book
remove unneeded casts
Merge pull request #5193 from illi-kun/master

astyle main_menu.cpp
Merge pull request #5189 from BevapDin/partial-weaopn-drop

Allow dropping parts of wielded stacks
Merge pull request #5194 from BevapDin/fix-saving-while-reading

Fix for #5191