HGKeeper

Convert all of the unit tests to GTK4
gtk4
2022-01-31, Gary Kramlich

9dc271918fe6

Convert all of the unit tests to GTK4

Testing Done:
Compiled each test by itself. They still error out because of `TalkatuScrolledWindow` but thats the only error now.

Reviewed at https://reviews.imfreedom.org/r/1265/

# h1

## h2

### h3

#### h4

##### h5

###### h6

plain *emphasis* _emphasis_ ~~**strong**~~ __strong__ `code` plain

[Test link](https://pidgin.im)

`code`

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code?

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talkatu/talkatu