增加两个字体

src/less/lib/font.less

@@ -16,6 +16,9 @@
 @font-down-triangle: "e70b";
 @font-key: "e740";
 
+@font-plus: "e75b";
+@font-minus: "e75a";
+
 @font-arrow-left: "e70d";
 @font-arrow-right: "e70c";
 @font-change: "e72f";

src/less/resource/font.less

@@ -28,6 +28,10 @@
 .font-hover-active(dot-ha-font, @font-dot, @color-bi-text, @color-bi-text-gray, @color-bi-text-black);
 .font-effect(dot-e-font, @font-dot, transparent, transparent, transparent, @color-bi-text-highlight);
 
+// 加减号
+.font(plus-font, @font-plus);
+.font(minus-font, @font-minus);
+
 //向右展开子菜单
 .font(pull-right-font, @font-right-triangle);
 .font-hover(pull-right-h-font, @font-right-triangle);