Progressive Display Controls

[dsenalik]

I feel that the blast output controls are not clear, they are inconsistent with a lot of current conventions. Currently,
▼ means can be expanded
▲ means has been expanded (can be closed)
example below at "Before"

I propose changing them to those used by Windows 10+, and in fact used at their design site https://learn.microsoft.com/en-us/windows/apps/design/ on the left side.

˃ means can be expanded
˅ means has been expanded (can be closed)

Before

After

[laceysanderson]

Beautiful! Fixed via merged PR. Thanks!