adding tool options for manipulating a sphere
adding new tool for creating boxes, adding shortcuts
add preview to model when enter is pressed
rework appearance
create gui for changing tool
adding axes and grid, removing unneeded parts
button for adding preview to scene
make preview transparent
add possibility to move sphere
new buttons for selecting tool; show initial preview when new tool is selected
don't activate box tool on startup
adding a "geoDoc" which holds the relevant shapes
reworking handling of tools