Ignore disabled buttons on default hint mode

You can still click them if you use non-default hint modes
which I think is probably what users expect

src/lib/dom.ts

@@ -86,6 +86,10 @@ function isEditableHTMLInput(element: HTMLInputElement) {
     return false
 }
 
+export function isWithinDisabledFormControl(element: Element): boolean {
+    return element.closest(":disabled:not(fieldset)") !== null
+}
+
 /**
  * Dispatch a mouse event to the target element
  * based on cVim's implementation

src/lib/hint_util.ts

@@ -414,12 +414,19 @@ export class HintConfig implements HintOptions {
                     hinting.saveableElements(this.includeInvisible),
                 )
 
-            default:
-                return hinting.hintables(
+            default: {
+                const hintables = await hinting.hintables(
                     DOM.HINTTAGS_selectors,
                     this.jshints,
                     this.includeInvisible,
                 )
+                for (const hintable of hintables) {
+                    hintable.elements = hintable.elements.filter(
+                        element => !DOM.isWithinDisabledFormControl(element),
+                    )
+                }
+                return hintables
+            }
         }
     }