Timeline refactor (#2175)

* Move Timeline files into their own package

* Introduce TimelineViewModel, add coroutines

* Simplify StatusViewData

* Handle timeilne fetch errors

* Rework filters, fix ViewThreadFragment

* Fix NotificationsFragment

* Simplify Notifications and Thread, handle pin

* Redo loading in TimelineViewModel

* Improve error handling in TimelineViewModel

* Rewrite actions in TimelineViewModel

* Apply feedback after timeline factoring review

* Handle initial failure in timeline correctly

app/src/main/java/com/keylesspalace/tusky/util/StringUtils.kt

@@ -73,6 +73,15 @@ fun String.isLessThan(other: String): Boolean {
     }
 }
 
+fun String.idCompareTo(other: String): Int {
+    return when {
+        this === other -> 0
+        this.length < other.length -> -1
+        this.length > other.length -> 1
+        else -> this.compareTo(other)
+    }
+}
+
 fun Spanned.trimTrailingWhitespace(): Spanned {
     var i = length
     do {