Fixes the rendering of highlights when no user is present and includes options to render by e tags

quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt

@@ -121,6 +121,8 @@ open class Event(
 
     override fun taggedUrls() = tags.filter { it.size > 1 && it[0] == "r" }.map { it[1] }
 
+    override fun firstTagFor(vararg key: String) = tags.firstOrNull { it.size > 1 && it[0] in key }?.let { it[1] }
+
     override fun firstTaggedUser() = tags.firstOrNull { it.size > 1 && it[0] == "p" }?.let { it[1] }
 
     override fun firstTaggedEvent() = tags.firstOrNull { it.size > 1 && it[0] == "e" }?.let { it[1] }

quartz/src/main/java/com/vitorpamplona/quartz/events/EventInterface.kt

@@ -133,6 +133,8 @@ interface EventInterface {
 
     fun taggedUrls(): List<String>
 
+    fun firstTagFor(vararg key: String): String?
+
     fun firstTaggedAddress(): ATag?
 
     fun firstTaggedUser(): HexKey?

quartz/src/main/java/com/vitorpamplona/quartz/events/HighlightEvent.kt

@@ -42,6 +42,8 @@ class HighlightEvent(
 
     fun inPost() = firstTaggedAddress()
 
+    fun inPostVersion() = firstTaggedEvent()
+
     companion object {
         const val KIND = 9802
         const val ALT = "Highlight/quote event"