Fix inspect setTerm and estimatedHeight

inspect.lua

@@ -5,6 +5,7 @@ local frame = term.current()
 
 local function setTerm(termlike)
     frame = termlike
+    listview.setTerm(frame)
 end
 
 local function setObject(other)
@@ -29,6 +30,10 @@ local function displayTab(self)
     listview.updatePage(self.scrollPos)
 end
 
+local function estimatedHeight()
+    return #keys
+end
+
 
 return {
     name="inspect",
@@ -36,4 +41,5 @@ return {
     setObject=setObject,
     fetch=fetch,
     displayTab=displayTab,
+    estimatedHeight=estimatedHeight,
 }