Base: Upgrade to jQuery 1.4

- Theme selection has been removed since default theme is now flat and
the old theme has been deprecated. In addition, the current flat theme
is not fully supported on jQM 1.4

- Fixed options panel not expanding properly on table view with no
results

- Fixed PHP errors from forecast function

- More changes coming especially in regard to the date picker which is
now featured in jQM 1.4