Update Sketch menu in IDE GUI

 * Have "Save Hex" option (with Ctrl + Shift + R as well)
 * Move Upload and Upload w/ Programmer into Sketch menu
   as they are functions of sketch and not file technically

Signed-off-by: Arnav Gupta <championswimmer@gmail.com>
also enable save hex command for windows properly

Signed-off-by: Arnav Gupta <championswimmer@gmail.com>