Change save button to store to specific slot and provide feature to transfer several slots

[mariobehling]

Change save button to store to specific slot. Expected is when a use clicks "Save" a pop up should open with a list of slots to save to.

The user needs to highlight the slot number to save too and then click "Save".

On the bottom of that screen should also be a button "Transfer" and there should also be a swipe button to enable the user to choose which slot to transfer.

This screen should also be available through the sidebar menu "Saved Badges"