updated bootstrap-slider to 10.6.2 (according to docs & package.json)

- updated bower.json
- updated package.json & package-lock.json
- added slider color options in build/less/miscellaneous.less
- updated bower_components
- updated pages/UI/sliders.html
- updated plugins files

build/less/miscellaneous.less

@@ -609,3 +609,29 @@
 hr {
   border-top: 1px solid @hr-border;
 }
+
+// bootstrap slider
+
+#red .slider-selection {
+    background: #f56954;
+}
+
+#blue .slider-selection {
+    background: #3c8dbc;
+}
+
+#green .slider-selection {
+    background: #00a65a;
+}
+
+#yellow .slider-selection {
+    background: #f39c12;
+}
+
+#aqua .slider-selection {
+    background: #00c0ef;
+}
+
+#purple .slider-selection {
+    background: #932ab6;
+}