Bug fixes and improvements #1

[eduingui]

• https://github.com/gprelatto/magicHolidays-front/issues/67
• https://github.com/gprelatto/magicHolidays-front/issues/61
• https://github.com/gprelatto/magicHolidays-front/issues/60
• https://github.com/gprelatto/magicHolidays-front/issues/51
• https://github.com/gprelatto/magicHolidays-front/issues/43
• https://github.com/gprelatto/magicHolidays-front/issues/42
• https://github.com/gprelatto/magicHolidays-front/issues/41
• https://github.com/gprelatto/magicHolidays-front/issues/35
• https://github.com/gprelatto/magicHolidays-front/issues/34
• https://github.com/gprelatto/magicHolidays-front/issues/29