* Fixed bug when automaticUpdateAtMidnight is set to 'true'. When set to 'true', the pray times were not update when changing the time from the DateTime component.
 * Fixed bug on Alerts Preference Page.
 * Implemented actions that allow the show/hide of SUNRISE/SUNSET times.
 * Modified Prefs keys.
 * Added images (gray, yellow or green points) according to the pray time (passed, sunrise/sunset or incoming).
 * Refactored code of main ViewPart.