[sublime keymap] Fix addCursorToSelection.

In addCursorToSelection, keep the cursor's position after short lines.

Author: liorgol1

keymap/sublime.js

@@ -156,8 +156,14 @@
     var ranges = cm.listSelections(), newRanges = [];
     for (var i = 0; i < ranges.length; i++) {
       var range = ranges[i];
-      var newAnchor = cm.findPosV(range.anchor, dir, "line");
-      var newHead = cm.findPosV(range.head, dir, "line");
+      var newAnchor = cm.findPosV(
+          range.anchor, dir, "line", range.anchor.goalColumn);
+      var newHead = cm.findPosV(
+          range.head, dir, "line", range.head.goalColumn);
+      newAnchor.goalColumn = range.anchor.goalColumn != null ?
+          range.anchor.goalColumn : cm.cursorCoords(range.anchor, "div").left;
+      newHead.goalColumn = range.head.goalColumn != null ?
+          range.head.goalColumn : cm.cursorCoords(range.head, "div").left;
       var newRange = {anchor: newAnchor, head: newHead};
       newRanges.push(range);
       newRanges.push(newRange);