add always visible lock icon on top right to show info about e… (#1403)

* improvement(layerui.js): add lock icon on top right to show encrypted info about excalidraw

fixes https://github.com/excalidraw/excalidraw/issues/1313

* swap lock with shield

* fix dimensions

* make link open in new tab

* add newline between toolip text and link

* increase tooltip line-height

* remove unused GitHubCorner compo

* reposition; reintroduce GH icon

* make shield into link

* make tooltip not show when drawing

* Review fix

* remove link from tooltip

Co-authored-by: dwelle <luzar.david@gmail.com>

src/css/styles.scss

@@ -266,6 +266,10 @@ button,
   align-items: flex-start;
   cursor: default;
   pointer-events: none !important;
+
+  section {
+    display: flex;
+  }
 }
 
 .App-menu_bottom > * {