Add support for iosRefreshButton config, which adds a refresh button to the top right of the navigation bar.
Nav title image and user agent customization options.

Add config to allow enabling navigation title image by url regex.
Add config to customize user agent by url regex.
Sync sidebar menu with tabs. Various bug fixes.

Bugs fixed:
- network activity indicator when switching webview
- postload javascript not being called in various scenarios
- prematurely showing webview when page loads are interrupted
Better handling of logout.
Fix localCache.zip for ios 8.
Support replacing arbitrary strings in HTML. Some bug fixes.

Bug fixes:
- Fix webview loads failing when there are webview pools.
- Select first item in tab bar
Update refresh icon.
Handle tel: url schemes
Disable double-tap in webviews.