[Minor] Also style paper-tabs

bower.json

@@ -1,7 +1,7 @@
 {
   "name": "strolch-wc-styles",
   "description": "Strolch WebComponent Styles",
-  "version": "0.4.6",
+  "version": "0.4.7",
   "authors": ["Robert von Burg"],
   "keywords": [
     "strolch",

strolch-wc-app-style.html

@@ -89,6 +89,10 @@
                 z-index: 10;
             }
 
+            paper-tabs {
+                --paper-tabs-selection-bar-color: var(--app-regular-highlight-bg-color);
+            }
+
             paper-menu {
                 --paper-menu-selected-item: {
                     background-color: var(--app-light-highlight-bg-color);