Change default AuthComponent::$loginRedirect to settings/dashboard

Closes #406
Enable translations for Contact fields

Closes #387
Avoid perf issues in Mysql with large offsets in queries

Suggested-By: @AD7six
Improves 2d9538eb771b4c622de2c2b42df5320b39e4123c
Enable code-coverage for scrutinizer in travis

The code coverage check is active on php 5.4 and sqlite
Remove unnecessary check

Further improves fe6795148fc that improved 2d9538eb77
Suggested-By: @AD7six
Add 'admin' key in Extensions menu and reorder 'admin' as first key the array
Fix: Avoid `Undefined index` errors when saving to a new table

Closes #411