[UX] Add Polish keyboard layout (#6762)

frontend/ui/data/keyboardlayouts/pl_keyboard.lua

@@ -0,0 +1,51 @@
+-- Start with the english keyboard layout (deep copy, to not alter it)
+local pl_keyboard = require("util").tableDeepCopy(require("ui/data/keyboardlayouts/en_keyboard"))
+
+local keys = pl_keyboard.keys
+
+-- Umlaut keys on standard keyboard
+keys[1][3][5] = 'Ę'
+keys[1][3][6] = 'ę'
+keys[1][9][5] = 'Ó'
+keys[1][9][6] = 'ó'
+keys[2][1][5] = 'Ą'
+keys[2][1][6] = 'ą'
+keys[2][2][5] = 'Ś'
+keys[2][2][6] = 'ś'
+keys[2][9][5] = 'Ł'
+keys[2][9][6] = 'ł'
+keys[3][2][5] = 'Ż'
+keys[3][2][6] = 'ż'
+keys[3][3][5] = 'Ź'
+keys[3][3][6] = 'ź'
+keys[3][4][5] = 'Ć'
+keys[3][4][6] = 'ć'
+keys[3][7][5] = 'Ń'
+keys[3][7][6] = 'ń'
+
+-- popup keyboard - move polish characters to east
+keys[1][3][1].east = 'Ę'; keys[1][3][1].south = 'Ê'
+keys[1][3][2].east = 'ę'; keys[1][3][2].south = 'ê'
+keys[1][9][1].east = 'Ó'; keys[1][9][1].northeast = 'Ô'
+keys[1][9][2].east = 'ó'; keys[1][9][2].northeast = 'ô'
+keys[2][1][1].east = 'Ą'; keys[2][1][1].south = 'Â'
+keys[2][1][2].east = 'ą'; keys[2][1][2].south = 'â'
+keys[2][2][1].east = 'Ś'; keys[2][2][1].northeast = 'Ŝ'
+keys[2][2][2].east = 'ś'; keys[2][2][2].northeast = 'ŝ'
+keys[2][9][1].east = 'Ł'; keys[2][9][1].west = '+'
+keys[2][9][2].east = 'ł'; keys[2][9][2].west = '+'
+keys[3][2][1].east = 'Ż'; keys[3][2][1].southwest = ''
+keys[3][2][1].west = 'Ź'; keys[3][2][1].northeast = 'Ž'
+keys[3][2][2].east = 'ż'; keys[3][2][2].southwest = ''
+keys[3][2][2].west = 'ź'; keys[3][2][2].northeast = 'ž'
+keys[3][3][1].east = 'Ź'; keys[3][3][1].north = 'Χ'
+keys[3][3][2].east = 'ź'; keys[3][3][2].north = 'χ'
+keys[3][4][1].east = 'Ć'; keys[3][4][1].northeast = 'Ĉ'
+keys[3][4][2].east = 'ć'; keys[3][4][2].northeast = 'ĉ'
+keys[3][7][1].east = 'Ń'; keys[3][7][1].northeast = 'ɲ'
+keys[3][7][2].east = 'ń'; keys[3][7][2].northeast = 'ɲ'
+
+-- space
+keys[4][4].label = ""
+
+return pl_keyboard

frontend/ui/widget/virtualkeyboard.lua

@@ -667,6 +667,7 @@ local VirtualKeyboard = FocusManager:new{
         fr = "fr_keyboard",
         he = "he_keyboard",
         ja = "ja_keyboard",
+        pl = "pl_keyboard",
         pt_BR = "pt_keyboard",
         ro = "ro_keyboard",
         ko_KR = "ko_KR_keyboard",