fix cursor issue in Firefox

closes #111
closes #115

Author: zamfofex

codejar.ts

@@ -110,15 +110,6 @@ export function CodeJar(editor: HTMLElement, highlight: (e: HTMLElement, pos?: P
     let {anchorNode, anchorOffset, focusNode, focusOffset} = s
     if (!anchorNode || !focusNode) throw 'error1'
 
-    // If the anchor and focus are the editor element, return either a full
-    // highlight or a start/end cursor position depending on the selection
-    if (anchorNode === editor && focusNode === editor) {
-      pos.start = (anchorOffset > 0 && editor.textContent) ? editor.textContent.length : 0
-      pos.end = (focusOffset > 0 && editor.textContent) ? editor.textContent.length : 0
-      pos.dir = (focusOffset >= anchorOffset) ? '->' : '<-'
-      return pos
-    }
-
     // Selection anchor and focus are expected to be text nodes,
     // so normalize them.
     if (anchorNode.nodeType === Node.ELEMENT_NODE) {