[editor] Add some UI elements in order to set font size & color, and ink thickness & color

src/core/annotation.js

@@ -3767,7 +3767,7 @@ class InkAnnotation extends MarkupAnnotation {
     }
 
     const appearanceBuffer = [
-      `${thickness} w`,
+      `${thickness} w 1 J 1 j`,
       `${getPdfColor(color, /* isFill */ false)}`,
     ];
     const buffer = [];