Fix Shift+function key not working

Also support pressing F13-f25 function keys. Fixes #485

terminfo/kitty.terminfo

@@ -76,7 +76,20 @@ xterm-kitty|KovIdTTY,
 	kf10=\E[21~,
 	kf11=\E[23~,
 	kf12=\E[24~,
+	kf13=\E[1;2P,
+	kf14=\E[1;2Q,
+	kf15=\E[1;2R,
+	kf16=\E[1;2S,
+	kf17=\E[15;2~,
+	kf18=\E[17;2~,
+	kf19=\E[18;2~,
 	kf2=\EOQ,
+	kf20=\E[19;2~,
+	kf21=\E[20;2~,
+	kf22=\E[21;2~,
+	kf23=\E[23;2~,
+	kf24=\E[24;2~,
+	kf25=\E[1;5P,
 	kf3=\EOR,
 	kf4=\EOS,
 	kf5=\E[15~,