Cleanup, minor corrections, metrics finetuning

...u/quasseldroid/ui/chat/messages/QuasselMessageRenderer.kt

app/src/main/res/drawable-nodpi/profile.png

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

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

app/src/main/res/values-de/strings.xml

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

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

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