Split picker.json from keysym label mapping

This will allow parts of the picker to be defined without this style of
section, and also lays the groundwork for showing different labels for
international keyboard layouts.

How/if to translate is still unclear.

Author: ids1024

layouts/keysym/README.md

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+`base.json` should include keys that are displayed the same way regardless of layout, while `en_us.json` has those for the English US layout that may differ in another layout.
+
+If it turns out that something actually should/shouldn't differ between different layouts, it can be moved between `base.json` and layout specific files.

layouts/keysym/base.json

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+{
+  "F1": "F1",
+  "F2": "F2",
+  "F3": "F3",
+  "F4": "F4",
+  "F5": "F5",
+  "F6": "F6",
+  "F7": "F7",
+  "F8": "F8",
+  "F9": "F9",
+  "F10": "F10",
+  "F11": "F11",
+  "F12": "F12",
+  "F13": "F13",
+  "F14": "F14",
+  "F15": "F15",
+  "F16": "F16",
+  "F17": "F17",
+  "F18": "F18",
+  "F19": "F19",
+  "F20": "F20",
+  "F21": "F21",
+  "F22": "F22",
+  "F23": "F23",
+  "F24": "F24",
+  "LEFT": "Left",
+  "UP": "Up",
+  "DOWN": "Down",
+  "RIGHT": "Right",
+  "HOME": "Home",
+  "PGUP": "PgUp",
+  "PGDN": "PgDn",
+  "END": "End",
+  "RESET": "Reset",
+  "ROLL_OVER": "Reuse",
+  "NONE": "None",
+  "MUTE": "Mute",
+  "VOLUME_UP": "Vol Up",
+  "VOLUME_DOWN": "Vol Down",
+  "PLAY_PAUSE": "Play Pause",
+  "MEDIA_NEXT": "Next Track",
+  "MEDIA_PREV": "Prev Track",
+  "FAN_TOGGLE": "Fan Toggle",
+  "DISPLAY_TOGGLE": "Screen Toggle",
+  "BRIGHTNESS_UP": "Screen Up",
+  "BRIGHTNESS_DOWN": "Screen Down",
+  "DISPLAY_MODE": "Screen Mode",
+  "SUSPEND": "Suspend",
+  "CAMERA_TOGGLE": "Camera Toggle",
+  "AIRPLANE_MODE": "Airplane Mode",
+  "TOUCHPAD": "Touchpad Toggle",
+  "SYSTEM_POWER": "Power",
+  "KBD_TOGGLE": "LED On Off",
+  "KBD_UP": "LED Brighten",
+  "KBD_DOWN": "LED Darken",
+  "KBD_BKL": "LED Cycle",
+  "KBD_COLOR": "LED Color",
+  "LAYER_ACCESS_1": "Access Layer\u00a01",
+  "FN": "Access Layer\u00a02",
+  "LAYER_ACCESS_3": "Access Layer\u00a03",
+  "LAYER_ACCESS_4": "Access Layer\u00a04",
+  "LAYER_SWITCH_1": "Switch to\nLayer\u00a01",
+  "LAYER_SWITCH_2": "Switch to\nLayer\u00a02",
+  "LAYER_SWITCH_3": "Switch to\nLayer\u00a03",
+  "LAYER_SWITCH_4": "Switch to\nLayer\u00a04",
+  "MS_UP": "Mouse cursor up",
+  "MS_DOWN": "Mouse cursor down",
+  "MS_LEFT": "Mouse cursor left",
+  "MS_RIGHT": "Mouse cursor right",
+  "MS_BTN1": "Press button 1",
+  "MS_BTN2": "Press button 2",
+  "MS_BTN3": "Press button 3",
+  "MS_BTN4": "Press button 4",
+  "MS_BTN5": "Press button 5",
+  "MS_BTN6": "Press button 6",
+  "MS_BTN7": "Press button 7",
+  "MS_BTN8": "Press button 8",
+  "MS_WH_UP": "Move wheel up",
+  "MS_WH_DOWN": "Move wheel down",
+  "MS_WH_LEFT": "Move wheel left",
+  "MS_WH_RIGHT": "Move wheel right",
+  "MS_ACCEL0": "Set speed to 0",
+  "MS_ACCEL1": "Set speed to 1",
+  "MS_ACCEL2": "Set speed to 2"
+}

layouts/keysym/en_us.json

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+{
+  "A": "A",
+  "B": "B",
+  "C": "C",
+  "D": "D",
+  "E": "E",
+  "F": "F",
+  "G": "G",
+  "H": "H",
+  "I": "I",
+  "J": "J",
+  "K": "K",
+  "L": "L",
+  "M": "M",
+  "N": "N",
+  "O": "O",
+  "P": "P",
+  "Q": "Q",
+  "R": "R",
+  "S": "S",
+  "T": "T",
+  "U": "U",
+  "V": "V",
+  "W": "W",
+  "X": "X",
+  "Y": "Y",
+  "Z": "Z",
+  "1": "!\n1",
+  "2": "@\n2",
+  "3": "#\n3",
+  "4": "$\n4",
+  "5": "%\n5",
+  "6": "^\n6",
+  "7": "&\n7",
+  "8": "*\n8",
+  "9": "(\n9",
+  "0": ")\n0",
+  "LEFT_ALT": "Left Alt",
+  "LEFT_CTRL": "Left Ctrl",
+  "LEFT_SHIFT": "Left Shift",
+  "LEFT_SUPER": "Left Super",
+  "RIGHT_ALT": "Right Alt",
+  "RIGHT_CTRL": "Right Ctrl",
+  "RIGHT_SHIFT": "Right Shift",
+  "RIGHT_SUPER": "Right Super",
+  "ENTER": "Enter",
+  "BKSP": "Bksp",
+  "DEL": "Del",
+  "TAB": "Tab",
+  "SPACE": "Space",
+  "CAPS": "Caps",
+  "APP": "Menu",
+  "ESC": "Esc",
+  "PRINT_SCREEN": "PrtSc\nSysrq",
+  "INSERT": "Ins",
+  "SCROLL_LOCK": "Scroll Lock",
+  "PAUSE": "Pause\nBreak",
+  "NUM_LOCK": "Num Lock",
+  "NUM_7": "7",
+  "NUM_8": "8",
+  "NUM_9": "9",
+  "NUM_MINUS": "-",
+  "NUM_PLUS": "+",
+  "NUM_SLASH": "/",
+  "NUM_4": "4",
+  "NUM_5": "5",
+  "NUM_6": "6",
+  "NUM_ASTERISK": "*",
+  "NUM_ENTER": "Enter",
+  "NUM_0": "0",
+  "NUM_1": "1",
+  "NUM_2": "2",
+  "NUM_3": "3",
+  "NUM_PERIOD": ".",
+  "TICK": "~\n`",
+  "QUOTE": "\"\n'",
+  "SEMICOLON": ":\n;",
+  "MINUS": "_\n-",
+  "EQUALS": "+\n=",
+  "SLASH": "?\n/",
+  "COMMA": "<\n,",
+  "PERIOD": ">\n.",
+  "BACKSLASH": "|\n\\",
+  "BRACE_OPEN": "{\n[",
+  "BRACE_CLOSE": "}\n]",
+  "NONUS_HASH": "Non-US #",
+  "NONUS_BSLASH": "Non-US \\"
+
+}