disable selecting (outside of editor and terminal)

src/index.scss

@@ -12,6 +12,7 @@
 body {
     // no scrolling of the page
     overflow: hidden;
+    user-select: none;
 }
 
 // Utility classes
@@ -39,6 +40,10 @@ body {
 
 // global style tweaks
 
+.#{$ns}-dialog {
+    user-select: none;
+}
+
 .#{$ns}-form-group > .#{$ns}-label {
     font-weight: bolder;
 }