update gl symbol list so that they all render in imagetest container

Author: etpinard

src/constants/gl_markers.js

@@ -10,14 +10,13 @@
 'use strict';
 
 module.exports = {
-    circle: '●',
+    'circle': '●',
     'circle-open': '○',
-    square: '■',
+    'square': '■',
     'square-open': '□',
-    diamond: '◆',
+    'diamond': '◆',
     'diamond-open': '◇',
-    cross: '+',
-    x: '❌',
+    'cross': '✚',
     'triangle-up': '▲',
     'triangle-up-open': '△',
     'triangle-down': '▼',
@@ -41,16 +40,38 @@ module.exports = {
     'hexagon2': '⬣',
     'star': '★',
     'star-open': '☆',
-    'hexagram': '✶',
     'diamond-tall': '♦',
     'diamond-tall-open': '♢',
-    'hourglass': '⧗',
-    'hourglass-open': '⧖',
+    'diamond-wide': '▰',
+    'diamond-wide-open': '▱',
     'bowtie': '⧓',
     'bowtie-open': '⋈',
-    'circle-cross': '⊕',
-    'circle-x': '⊗',
+    'circle-cross': '⨁',
+    'circle-x': '⨂',
     'square-cross': '⊞',
     'square-x': '⊠',
-    'asterisk': '✱'
+    'diamond-cross': '⟠',
+    'diamond-x': '❖',
+    'cross-thin': '+',
+    'cross-thin-open': '+',
+    'x-thin': '╳',
+    'x-thin-open': '╳',
+    'asterisk': '✳',
+    'asterisk-open': '✳',
+    'y-up': '⅄',
+    'y-up-open': '⅄',
+    'y-down': 'Y',
+    'y-down-open': 'Y',
+    'y-left': '≺',
+    'y-left-open': '≺',
+    'y-right': '≻',
+    'y-right-open': '≻',
+    'line-ew': '─',
+    'line-ew-open': '─',
+    'line-ns': '│',
+    'line-ns-open': '│',
+    'line-ne': '╱',
+    'line-ne-open': '╱',
+    'line-nw': '╲',
+    'line-nw-open': '╲'
 };