[GraphView] add custom avatars

[vantu5z]

Inspirited by a volunteer ideas who would rather remain anonymous (sent me email with avatar included).

Add presets for avatars and allow user to set it from own files.
Styles:

• Custom
• Dark (default)
• Light
• Cartoon

Avatar support can be extended to show different avatars depending on person attributes (not only gender).

[emyoulation]

Several people have asked about illustrating graphs in the way described:
"Avatar support can be extended to show different avatars depending on person attributes (not only gender). "
Currently, they can do this by showing Tags. But the meaning is not intuitive... there has to be a color key to lookup what 'purple' or 'orange' means.

An example might be that they want to use a 'boat' avatar for anyone with an "immigration" event. Or a specific Attribute value.

How could the Avatar option be implemented?

(If the Avatar modification is complex, I can see a viable alternative of writing a SuperScript that inserts a particular media object at the beginning of their Gallery.)

[vantu5z]

@emyoulation Do you mean something like this #477. It's not finished for now and I have no time to make it done.

[emyoulation]

That looks cool!

Do you mind if I point it out to Chris Horn? It looks like something that fit nicely into his CardView.

[vantu5z]

Why not, if this help to make Grams better.