Add buttons to pileup demo

Author: xhlulu

apps/dash-pileup-demo/assets/general-app-page.css

@@ -58,7 +58,7 @@
     margin-right: 10px;
     transition-duration: 500ms;
 }
-#gh-link {
+.gh-link {
     text-decoration: none;
     font-size: 10pt;
     font-family: sans-serif;
@@ -77,7 +77,7 @@
     margin-left: 0px;
     transition-duration: 400ms;
 }
-#gh-link:hover {
+.gh-link:hover {
     color: #dfe8f3 !important;
     border-color: #dfe8f3 !important;
 }

apps/dash-pileup-demo/layout_helper.py

@@ -70,12 +70,20 @@ def app_page_layout(
                     ),
                     html.H2(app_title),
                     html.A(
-                        id="gh-link",
-                        children=["View on GitHub"],
-                        href="http://github.com/plotly/dash-bio/"
-                        "blob/master/tests/dashbio_demos/dash-{}/app.py".format(
-                            app_name
-                        ),
+                        children=["Enterprise Demo"],
+                        className="gh-link",
+                        href="http://github.com/plotly/dash-bio/",
+                        style={
+                            "color": "white" if light_logo else "black",
+                            "border": "solid 1px white"
+                            if light_logo
+                            else "solid 1px black",
+                        },
+                    ),
+                    html.A(
+                        className="gh-link",
+                        children=["Source Code"],
+                        href="https://github.com/plotly/dash-sample-apps/tree/main/apps/dash-pileup-demo",
                         style={
                             "color": "white" if light_logo else "black",
                             "border": "solid 1px white"