This reverts merge request !1526

Revert "Merge branch 'from/develop/tusooa/lang-opts' into 'develop'"

See merge request !1526

This reverts merge request !1494

Add language options

See merge request !1494

Update dependency semver to v5.7.1

See merge request !1491

Update dependency webpack-merge to v0.20.0

See merge request !1496

Update dependency @vuelidate/core to v2.0.0-alpha.41

See merge request !1501

Pass file name of cropped avatar to form data

See merge request !1522

Poll-end notifications

See merge request !1524

Ref: poll-notif

Ref: poll-notif

Ref: poll-notif

Ref: poll-notif

Fix virtual scrolling when the user has a lot of pinned statuses

See merge request !1523

fix "allow discovery" setting misbehaving

See merge request !1518

fix some chat errors/warnings that sometimes happen

See merge request !1515

Fix incorrect close of a status popover when clicking Expand inside it

Closes #1157

See merge request !1514

basically Vue (3 in particular?) will make changes to DOM before this event
listener is called, and if the target is displayed using v-if, it will not
be part of the DOM at that time, and contains() will return false. so it
goes to call hidePopover() which caused this bug.

fix hashtags by explicitly putting attributes

See merge request !1513

Fix image cropper not closing correctly

See merge request !1512

Fix tab switcher not working when some tabs hidden

Closes #1158

See merge request !1511

Fix mobile nav link text colour

See merge request !1510

Fix shrug text in muted status

Closes #1160

See merge request !1509