Fix caps and iCal - text!

Fixed some text stuff, gonna try and add this to another pull request, wish me luck!

Themes/default/languages/ManageCalendar.english.php

@@ -16,7 +16,7 @@ $txt['setting_cal_days_for_index'] = 'Max days in advance on board index';
 $txt['setting_cal_showholidays'] = 'Show holidays';
 $txt['setting_cal_showbdays'] = 'Show birthdays';
 $txt['setting_cal_showevents'] = 'Show events';
-$txt['setting_cal_export'] = 'Allow events to be exported in Ical format';
+$txt['setting_cal_export'] = 'Allow events to be exported in iCal format';
 $txt['setting_cal_show_never'] = 'Never';
 $txt['setting_cal_show_cal'] = 'In calendar only';
 $txt['setting_cal_show_index'] = 'On board index only';
@@ -35,8 +35,8 @@ $txt['current_holidays'] = 'Current Holidays';
 $txt['holidays_title'] = 'Holiday';
 $txt['holidays_title_label'] = 'Title';
 $txt['holidays_delete_confirm'] = 'Are you sure you wish to remove these holidays?';
-$txt['holidays_add'] = 'Add New Holiday';
-$txt['holidays_edit'] = 'Edit Existing Holiday';
+$txt['holidays_add'] = 'Add new holiday';
+$txt['holidays_edit'] = 'Edit existing holiday';
 $txt['holidays_button_add'] = 'Add';
 $txt['holidays_button_edit'] = 'Edit';
 $txt['holidays_button_remove'] = 'Remove';