Patch notes: v1.5.4

Patch notes v1.5.0 → v1.5.4:

• Added long break prompt after WORKing for long

• Added a new "nature" alarm theme

• Added a confirm dialog before deleting a pomodoro cycle

• Added an explanation tip for pause budget

• Added a shortcut to take screenshot (F10)

• Added a piece of newsletter about keyboard shortcuts

• Added a following mode (double click a citizen or animal)

• Fixed a noncontinuous span bug

• Fixed an ambient preview bug

• Fixed a wrong icon on the reward view under dark mode

• Improved the interface behaviour with a mouse wheel