Dev: Replace the clock face image and update the alam clock and timer accordions

[simonjvardy]

• Replace the square clock-face image with a round version to look more like a clock
• Update the animated css gradient with a colour palette from cooulors website
• Add in drop shadows on teh clock hands
• Update the clock text with solid lettering and colour #777777
• Add hh, mm and ss selections for the timer
• Refactor the alarm clock time input fields