Minor fixed + added grades tab

app/build.gradle

app/src/main/java/fr/nitorac/aurionweb/MainActivity.java

...in/java/fr/nitorac/aurionweb/aurionweb/AurionManager.java

...in/java/fr/nitorac/aurionweb/aurionweb/AurionSession.java

...va/fr/nitorac/aurionweb/fragments/AurionViewFragment.java

...itorac/aurionweb/fragments/calendar/CalendarFragment.java

...torac/aurionweb/fragments/calendar/CalendarViewModel.java

...va/fr/nitorac/aurionweb/fragments/home/HomeViewModel.java

...ionweb/fragments/notifications/NotificationsFragment.java

...onweb/fragments/notifications/NotificationsViewModel.java

.../nitorac/aurionweb/fragments/results/ResultsFragment.java

app/src/main/res/drawable-anydpi/ic_grade.xml

app/src/main/res/drawable-hdpi/ic_grade.png

app/src/main/res/drawable-mdpi/ic_grade.png

app/src/main/res/drawable-xhdpi/ic_grade.png

app/src/main/res/drawable-xxhdpi/ic_grade.png

app/src/main/res/layout/fragment_results.xml

app/src/main/res/menu/bottom_nav_menu.xml

app/src/main/res/navigation/mobile_navigation.xml

app/src/main/res/values-fr-rFR/strings.xml