pNES 3.4

• pfba: add spectrum hardware roms filter
• pfba: fix spectrum roms not detected/handled correctly
• pfba: fix crash on some roms (Forgotten Worlds cps1, gaiapols...)
• pfba: remove now unnecessary force 50hz option
• pfba: update fba to latest git (2019-03-28)
• psnes: update to latest snes9x git (2019-03-28)
• psnes: fix save states loading
• psnes: use bigger font size for menus
• psnes: fix crash in some games (cool world...)
• psnes/pnes: fix uppercase roms not detected
• pemu: menu: add main/roms options delimiter
• pemu: menu: make options values wider, change selected option value color, set highlight size to selected value
• pemu: fix ui inputs changing with roms inputs change

- skins: use zipped skins (put zipped skins in "skins" directory)
- skins: add skin selection to main options menu
- skins: change "skin" path to "skins"
- skins: change "ROM_ITEM" name/type to "TEXT"
- skins: add "color_missing", "color_not_working" and "highlight_use_text_color" options to "ROM_LIST > TEXT" skin config
- options menu: set states options menu at the first place, for easier in game access
- states menu: fix bug to return to main menu with back button
- states: allow loading a rom with it's state from the main rom menu
- states menu: add tween position for a better effect
- switch: input: use joystick click/press for either start (left joycon) or select (right joycon) on single joycon mode