Add lists_sort block.

msg/messages.js

@@ -975,6 +975,26 @@ Blockly.Msg.LISTS_GET_SUBLIST_TAIL = '';
 /// [[File:Blockly-get-sublist.png]]
 Blockly.Msg.LISTS_GET_SUBLIST_TOOLTIP = 'Creates a copy of the specified portion of a list.';
 
+/// url - Infomation describing sorting a list.
+Blockly.Msg.LISTS_SORT_HELPURL = 'https://github.com/google/blockly/wiki/Lists#sorting-a-list';
+/// Sort as type %1 (numeric or alphabetic) in order %2 a list of items %1.
+Blockly.Msg.LISTS_SORT_TITLE = 'sort %1 %2 %3';
+/// tooltip - See [https://github.com/google/blockly/wiki/Lists#sorting-a-list].
+Blockly.Msg.LISTS_SORT_TOOLTIP = 'Sort a list.';
+/// sorting order or direction from low to high values
+/// sorting order, or direction. 
+/// Ascending means low to high value for numeric, or A-Z for alphabetic.
+Blockly.Msg.LISTS_SORT_ORDER_ASCENDING = 'ascending';
+/// sorting order, or direction. 
+/// Descending means the opposite direction from ascending.
+Blockly.Msg.LISTS_SORT_ORDER_DESCENDING = 'descending';
+/// sort by treating each item as a number.
+Blockly.Msg.LISTS_SORT_TYPE_NUMERIC = 'numeric';
+/// sort by treating each item alphabetically, case-sensitive.
+Blockly.Msg.LISTS_SORT_TYPE_TEXT = 'alphabetic';
+/// sort by treating each item alphabetically, ignoring differences in case.
+Blockly.Msg.LISTS_SORT_TYPE_IGNORECASE = 'alphabetic, ignore case';
+
 /// url - Information describing splitting text into a list, or joining a list into text.
 Blockly.Msg.LISTS_SPLIT_HELPURL = 'https://github.com/google/blockly/wiki/Lists#splitting-strings-and-joining-lists';
 /// dropdown - Indicates that text will be split up into a list (e.g. "a-b-c" -> ["a", "b", "c"]).