Feature Idea: Add option to turn off auto-random icon

[chenilim]

Summary:
Creating a new card automatically sets a random icon. This is by design, as it makes cards immediately distinguishable. However, sometimes we want to turn that off

How important this is to me and why:

Importance: Medium

Additional context / similar features:
P1: Add an option to the settings menu to turn this off. Store in localStorage per-client for now.
Bonus points: Create a userSettings.ts class to manage other settings like this
P3: (Future) consider how to store this and similar settings per server / instance / board

[kevr]

I was looking for an option for this the other day; sounds like a fantastic idea to me!

[Johennes]

I'd like to help address this and pushed a proposal for the a global "no random icons" option to #310.