Merge branch 'master' into sync-part-1

core/src/main/java/tachiyomi/core/preference/TriState.kt

@@ -0,0 +1,16 @@
+package tachiyomi.core.preference
+
+enum class TriState {
+    DISABLED, // Disable filter
+    ENABLED_IS, // Enabled with "is" filter
+    ENABLED_NOT, // Enabled with "not" filter
+    ;
+
+    fun next(): TriState {
+        return when (this) {
+            DISABLED -> ENABLED_IS
+            ENABLED_IS -> ENABLED_NOT
+            ENABLED_NOT -> DISABLED
+        }
+    }
+}