Support new icon set after Obsidian 1.7.3

[Quorafind]

Hello, phibr0 & johnny

I give this update:

• Support new icon set from Obsidian 1.7.3
• Using getIconIds() to get all Obsidian available icons
• Update all App reference to match Obsidian 1.7.3 api spec.

Thanks for reviewing.