Changed CasioStyleG7710 notification icon to show number of undismissed notifications

[borkymcgee]

Previously, CasioStyleG7710's notification icon only showed an 'i' if there were any unread notifications (i.e. notifications that the watch recieved while notifications were muted)

This change implements the fix i proposed in #1803, displaying the number of undismissed notifications present instead

[github-actions[bot]]

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[FintasticMan]

As mentioned in #1616, we will implement this in all watch faces once notifications are synced with the connected device.

[borkymcgee]

Apologies, I forgot to show closed issues while searching for duplicates facepalm

[FintasticMan]

No worries!