Timezone dropdown

[danirabbit]

Replaces a bunch of deprecated stuff with a Gtk.Dropdown that has search

Fixes #119

[ryonakano]

For me, the chosen timezone is not selected after restarting System Settings. Instead, the first timezone in the list is selected:

I'm using the system in Japanese so maybe a locale issue. (running the System Setting with setting LANG=C works fine)

[vjr]

This PR works for me, fixes #119 at least, plus I've opened a PR #127 to be merged into this one.

[ryonakano]

For me, the chosen timezone is not selected after restarting System Settings. Instead, the first timezone in the list is selected:

I'm using the system in Japanese so maybe a locale issue. (running the System Setting with setting LANG=C works fine)

I fixed this issue in #128

[ryonakano]

Ah, it looks like we need to update the screenshot again :)

[danirabbit]

@ryonakano done!

[ryonakano]

LGTM and works as expected! Also don't forget to update the Build-Depends list in the deb-packaging branch too 😉

[danirabbit]

@ryonakano here you go #130