Add check to avoid unbinding keys before binding takes place

src/inject.js

@@ -99,8 +99,8 @@
       showHelpPopup()
       $toggleBtn.show()
       if (!keysBound) {
-        keysBound = true
         key('⌘+b, ⌃+b', toggleSidebar)
+        keysBound = true
       }
 
       if (repoChanged || reload) {
@@ -115,10 +115,12 @@
     else {
       toggleSidebar(false)
       $toggleBtn.hide()
+      if (keysBound) {
         key.unbind('⌘+b, ⌃+b')
         keysBound = false
       }
     }
+  }
 
   function selectTreeNode() {
     var tree = $.jstree.reference($treeView)