Release 2.3.1 (#828)

* chore: bump version to v2.3.1-preview

* Fix flashing of game covers

* Change sort order of games on the start page (most recently added first)

* Add "Date added" column to table in Collection Management

build.gradle.kts

@@ -6,7 +6,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
 import java.nio.file.Files
 
 group = "org.gameyfin"
-version = "2.3.0"
+version = "2.3.1-preview"
 
 allprojects {
     repositories {