rewrite threads with Kotlin & coroutines (#2617)

* initial class setup

* handle events and filters

* handle status state changes

* code formatting

* fix status filtering

* cleanup code a bit

* implement removeAllByAccountId

* move toolbar into fragment, implement menu

* error and load state handling

* fix pull to refresh

* implement reveal button

* use requireContext() instead of context!!

* jump to detailed status

* add ViewThreadViewModelTest

* fix ktlint

* small code improvements (thx charlag)

* add testcase for toggleRevealButton

* add more state change testcases to ViewThreadViewModel

app/src/main/java/com/keylesspalace/tusky/viewdata/StatusViewData.kt

@@ -42,6 +42,7 @@ sealed class StatusViewData {
          */
         /** Whether the status meets the requirement to be collapse  */
         val isCollapsed: Boolean,
+        val isDetailed: Boolean = false
     ) : StatusViewData() {
         override val id: String
             get() = status.id