Add language dropdown to compose view (#2651)

* Add UI for selecting post language

* Apply selected language when sending status

* Save/restore post language with drafts

* Fall back to english if the configured language isn't found in the locale list (no-NB)

* Remove comment about no_NB

* Move language dropdown to top of compose view

* Preserve language when redrafting

* Set default language to target post's language when replying

* Add Tusky license header to new source file

* Tweak language dropdown button width

app/src/main/java/com/keylesspalace/tusky/components/conversation/ConversationEntity.kt

@@ -94,7 +94,8 @@ data class ConversationStatusEntity(
     val expanded: Boolean,
     val collapsed: Boolean,
     val muted: Boolean,
-    val poll: Poll?
+    val poll: Poll?,
+    val language: String?,
 ) {
 
     fun toViewData(): StatusViewData.Concrete {
@@ -125,7 +126,8 @@ data class ConversationStatusEntity(
                 pinned = false,
                 muted = muted,
                 poll = poll,
-                card = null
+                card = null,
+                language = language,
             ),
             isExpanded = expanded,
             isShowingContent = showingHiddenContent,
@@ -167,7 +169,8 @@ fun Status.toEntity() =
         expanded = false,
         collapsed = true,
         muted = muted ?: false,
-        poll = poll
+        poll = poll,
+        language = language,
     )
 
 fun Conversation.toEntity(accountId: Long, order: Int) =

app/src/main/java/com/keylesspalace/tusky/components/conversation/ConversationViewData.kt

@@ -85,6 +85,7 @@ fun StatusViewData.Concrete.toConversationStatusEntity(
         expanded = expanded,
         collapsed = collapsed,
         muted = muted,
-        poll = poll
+        poll = poll,
+        language = status.language,
     )
 }