New ML support - added message MSG_LANGUAGE_NAME (es, it, pl)

lang/lang_en_es.txt

@@ -290,6 +290,10 @@
 "Endstops"
 "Topes finales"
 
+#MSG_LANGUAGE_NAME c=0 r=0
+"English"
+"Espanol"
+
 #MSG_Enqueing c=0 r=0
 "enqueing \x22"
 "enqueing \x22"

lang/lang_en_it.txt

@@ -290,6 +290,10 @@
 "Endstops"
 "Finecorsa (2)"
 
+#MSG_LANGUAGE_NAME c=0 r=0
+"English"
+"Italiano"
+
 #MSG_Enqueing c=0 r=0
 "enqueing \x22"
 "enqueing \x22"

lang/lang_en_pl.txt

@@ -290,6 +290,10 @@
 "Endstops"
 "Endstops"
 
+#MSG_LANGUAGE_NAME c=0 r=0
+"English"
+"Polski"
+
 #MSG_Enqueing c=0 r=0
 "enqueing \x22"
 "enqueing \x22"