Merge branch 'develop'

Fixed bugs around how the app is started and quit, updated all depend…

…encies to latest, adjusted the red color hue to make it more distinguishable to orange

Added test cases for Tray, cleaned up filtering, refined frontend, ad…

…ded icons for creation and completion dates in todo list, fixed bug

Added option to start application minimized to tray, added function w…

…hich helps reducing settings to the relevant only

Fixed bug which was not suppressing notifications when sent for the f…

…irst time

Renamed Util to Shared, updated workflow

Refactoring

Fixed unresponsive switch and slider elements, switched from Yarn to …

…npm, fixed bug with slider in settings

Refactored configuration handling in order to reduce re-renderings

Refactoring