Improvements to #530 styling

plugs/markdown/assets/markdown_widget.css

@@ -25,10 +25,29 @@ body {
     color: var(--root-color);
 }
 
-ul li p {
-    margin: 0;
+ul,
+ol {
+    margin-top: 0;
+    margin-bottom: 0;
 }
 
+ul {
+    list-style: none;
+}
+
+ul li::before {
+    content: "\2022";
+    /* Add content: \2022 is the CSS Code/unicode for a bullet */
+    color: var(--editor-list-bullet-color);
+    display: inline-block;
+    /* Needed to add space between the bullet and the text */
+    width: 1em;
+    /* Also needed for space (tweak if needed) */
+    margin-left: -1em;
+    /* Also needed for space (tweak if needed) */
+}
+
+
 body:hover #button-bar,
 body:active #button-bar {
     display: block;