Fix reset layout 'crash'

Fixes #629.
Fixup reset layout for tile mode

The show() is needed them, for each chart.
Update spanish translation with event creation warning
Remove Column Chooser from Chart Settings

Because the chart settings are modal its a really bad
idea to open up a column chooser from there. So, by
default, we don't have a column chooser option on the
search/filter box -- it must be explicitly requested.

We therefore explicity set the column chooser from the
mainwindow and also from the ride navigator window.
Merge pull request #630 from amtriathlon/master

Last update to spanish translation
New LTM Chart Setup Mockups

.. to support measures, metrics, bests and user defined
   (formula). For v3.1 development.
Minor website update.
Version 3 Release

.. update of build and upgrade processing for
   release 3 final update.