Resolve "user-friendly documentation for plugin URL field"

Closes #479 (closed)

frontend-js/src/main/css/global.css

@@ -399,6 +399,13 @@ table.minerva-window-drug-table td {
     width: 18px;
 }
 
+.minerva-plugin-dialog .minerva-help-button {
+    position: absolute;
+    top: 4px;
+    right: 1px;
+    width: 18px;
+}
+
 .minerva-left-panel .minerva-label, .minerva-element-info-div .minerva-label {
     font-weight: 900;
     line-height: 24px;