Fix plugin styling

Change-Id: I83c0563f59ebbda42f1176f18c1bc974fb508c1a
diff --git a/dev/scss/main/plugin.scss b/dev/scss/main/plugin.scss
new file mode 100644
index 0000000..dce86a3
--- /dev/null
+++ b/dev/scss/main/plugin.scss
@@ -0,0 +1,16 @@
+/**
+ * Base rules for all plugin related styles,
+ * like widgets.
+ */
+
+div.view.widget {
+  padding-right: $right-view-distance;
+
+  > iframe {
+    margin:     0;
+    box-sizing: border-box;
+    padding:    0;
+    width:      100%;
+    overflow-x: auto;
+  }
+}
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