add F1-12 to termux via the extra keys popup feature

termux/termux.properties

@@ -2,21 +2,21 @@ extra-keys = [ \
   [ \
     'ESC', \
     '-', \
-    'BACKSLASH', \
-    'HOME', \
-    'UP', \
-    'END', \
-    'PGUP', \
-    'DEL' \
+    {key: BACKSLASH,popup: {macro: "F6", display: "F6"}}, \
+    {key: HOME, popup: {macro: "F5", display: "F5"}}, \
+    {key: UP, popup: {macro: "F4", display: "F4"}}, \
+    {key: END, popup: {macro: "F3", display: "F3"}}, \
+    {key: PGUP, popup: {macro: "F2", display: "F2"}}, \
+    {key: DEL, popup: {macro: "F1", display: "F1"}} \
   ], \
   [ \
     'TAB', \
     'CTRL', \
-    'ALT', \
-    'LEFT', \
-    'DOWN', \
-    'RIGHT', \
-    'PGDN', \
-    'DRAWER' \
+    {key: ALT, popup: {macro: "F12", display: "F12"}}, \
+    {key: LEFT, popup: {macro: "F11", display: "F11"}}, \
+    {key: DOWN, popup: {macro: "F10", display: "F10"}}, \
+    {key: RIGHT, popup: {macro: "F9", display: "F9"}}, \
+    {key: PGDN, popup: {macro: "F8", display: "F8"}}, \
+    {key: DRAWER, popup: {macro: "F7", display: "F7"}} \
   ] \
 ]