Use input_context in auto_pickup.cpp: test_pattern
use input_context in player.cpp: player::disp_info
Use input context in overmap::draw_overmap (when moving through search results)
use input_context in src/defense.cpp
use input_context in game::handle_key_blocking_activity
Remove long input(long ch) - not used anymore

Remove get_keypress, move its code into input_manager::get_input_event,
because it's not needed anywhere else and is actually only used on NON-TILES builds. TILES builds use the SDL input.