Bug 1649319: TinyMCE skin changed from light to lightgray

Copied the font files from lightgray skin to light skin
as both skins shared the same kind of fonts from IcoMoon tool,
and lightgray's are more complete.

Added rules in skin.min.css to load the icons
in correct place.

behatnotneeded

Change-Id: Ibe0dea938aae6accdd6022572d79a649b6bf0324

htdocs/js/tinymce/skins/light/skin.min.css

@@ -26,3 +26,48 @@
 .mce-menu-item:hover .mce-text,.mce-menu-item.mce-selected .mce-text{color:#333}
 .mce-window .mce-container-body { background: #fff; }
 .mce-window .mce-foot .mce-container-body { background: #f3f3f3; }
+
+/* Adding fonts for table edit - Bug 1649319*/
+
+.mce-i-tablerowprops:before {
+    content: "\e604"
+}
+.mce-i-tablecellprops:before {
+    content: "\e605"
+}
+.mce-i-table2:before {
+    content: "\e606"
+}
+.mce-i-tablemergecells:before {
+    content: "\e607"
+}
+.mce-i-tableinsertcolbefore:before {
+    content: "\e608"
+}
+.mce-i-tableinsertcolafter:before {
+    content: "\e609"
+}
+.mce-i-tableinsertrowbefore:before {
+    content: "\e60a"
+}
+.mce-i-tableinsertrowafter:before {
+    content: "\e60b"
+}
+.mce-i-tablesplitcells:before {
+    content: "\e60d"
+}
+.mce-i-tabledelete:before {
+    content: "\e60e"
+}
+.mce-i-tableleftheader:before {
+    content: "\e62a"
+}
+.mce-i-tabletopheader:before {
+    content: "\e62b"
+}
+.mce-i-tabledeleterow:before {
+    content: "\e800"
+}
+.mce-i-tabledeletecol:before {
+    content: "\e801"
+}