Comet v3.0: Nexus 3DS Support and QoL changes

Comet 3.0

• Full Nexus3DS compatibility, a new way to preserve both screens at once, and a long list of navigation and polish fixes.
  Nexus3DS support
• Reads Nexus3DS screenshot filenames, which embed the running game's title ID between the timestamp and the file suffix
• Supports Nexus3DS's optional "save screenshots in date folders" layout, alongside the regular flat one
• Both work on the same SD card as plain Luma screenshots, with no need to pick one or the other

Also new

• Merge Top/Bottom Screens, from any 3DS screenshot's More screen. Combines both screens into one image and adds it to your
  gallery with its own badge. No stereo 3D
• Every screenshot's More screen now shows its full file path, since screenshots can come from several different places now
• Move between screenshots directly from the More screen with Left/Right, no need to back out to the grid first

Quality of life

• New badges distinguishing nds-bootstrap tar screenshots, ones already extracted to SD, and merged screenshots from each other
• Redrawn badges throughout, fixing some stray white pixels visible on 3DS XL screens
• Copying to the Album, extracting from the tar, and merging now all keep you where you were instead of dropping back to the grid
• Deleting a screenshot is now more thorough about removing its companion files, including inside Nexus3DS's date folders

Fixed

• Sound effects didn't play for some touch-only interactions (opening a screenshot, switching DS tabs, tapping a filter), even
  though the action itself worked correctly
• Touch-holding "Show Bottom" played its sound but never actually showed the bottom screen. Physically holding the button still
  works throughout