Added enter key option, improved hostmask option

...n/java/de/kuschku/quasseldroid_ng/ui/chat/ChatActivity.kt

...uasseldroid_ng/ui/chat/messages/QuasselMessageRenderer.kt

...ku/quasseldroid_ng/ui/settings/data/AppearanceSettings.kt

...a/de/kuschku/quasseldroid_ng/ui/settings/data/Settings.kt

...a/de/kuschku/quasseldroid_ng/util/helper/SpannedHelper.kt

.../quasseldroid_ng/util/irc/format/IrcFormatDeserializer.kt

...a/de/kuschku/quasseldroid_ng/util/quassel/IrcUserUtils.kt

app/src/main/res/layout/layout_editor.xml

app/src/main/res/values/strings_preferences.xml

app/src/main/res/xml/preferences.xml