Fix Issue 1413: Local Texture Default Texture Update Settings, Also fix the side issue of the More section not having visible ui at first.

Also I got fed up with the bad code and leaks so I did some refactoring of floaterlocalassetbrowse.*, but just a bit.

indra/newview/app_settings/settings.xml

@@ -1017,6 +1017,17 @@ Found in Advanced->Rendering->Info Displays</string>
       <key>Value</key>
       <boolean>1</boolean>
     </map>
+    <key>LocalBitmapUpdate</key>
+    <map>
+      <key>Comment</key>
+      <string>Default setting for whether local textures should update or not upon change, changed by toggling on or off.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <boolean>0</boolean>
+    </map>
     <key>InstantMessageLogPathAnyAccount</key>
     <map>
       <key>Comment</key>