fix(desc): show non-image avatar correctly

[NozomuIkuta]

Fix #458

I found SDescAvatar shows avatar only when it's truthy, which is different from how SAvatar works. So I removed if-condition for SAvatar to have a control on what to show: image or initial of name.

@kiaking

If this is intended, please let me know and close this PR.

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[kiaking]

Ahhh good catch! thansk!