significant expansion of scss styling, incl. new _dashboard.scss sheet & comprehensive primary btn theme synced w. user palette; changes to all other scss files; list.html & base.html retrofitted w. corresponding scss classes

src/static_src/scss/_dashboard.scss

@@ -0,0 +1,21 @@
+#id_applets_container {
+    overflow-y: auto;
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+    padding: 0.5rem 0;
+
+    section {
+        border: 0.2rem solid rgba(var(--secUser), 0.5);
+        border-radius: 0.75rem;
+        padding: 1rem;
+    }
+}
+
+#id_dash_gear {
+    background: none;
+    border: none;
+    font-size: 1.5rem;
+    cursor: pointer;
+    color: rgba(var(--secUser), 0.6);
+}