fix: transform overlay to make underneath of the signature help clickable

Fixes
#49

Author: aminya

lib/signature-help-manager.js

@@ -309,18 +309,22 @@ module.exports = class SignatureHelpManager {
     // move box above the current editing line
     // HACK: patch the decoration's style so it is shown above the current line
     setTimeout(() => {
+      const overlay = view.element.parentElement
+      if (!overlay) {
+        return
+      }
       const hight = view.element.getBoundingClientRect().height
       const lineHight = editor.getLineHeightInPixels()
       const availableHight = (position.row - editor.getFirstVisibleScreenRow()) * lineHight
       if (hight < availableHight + 80) {
-        view.element.style.bottom = lineHight + hight + "px"
+        overlay.style.transform = `translateY(-${lineHight + hight}px)`
       } else {
         // move right so it does not overlap with auto-complete-list
         const autoCompleteList = editor.getElement().querySelector("autocomplete-suggestion-list")
         if (autoCompleteList) {
-          view.element.style.left = autoCompleteList.clientWidth + "px"
+          overlay.style.transform = `translateX(${autoCompleteList.clientWidth}px)`
         } else {
-          view.element.style.left = "300px"
+          overlay.style.transform = "translateX(300px)"
         }
       }
       view.element.style.visibility = "visible"