Improve deceptive network warning

app/src/main/assets/networks.json

...va/de/kuschku/quasseldroid/settings/AppearanceSettings.kt

...rc/main/java/de/kuschku/quasseldroid/settings/Settings.kt

...main/java/de/kuschku/quasseldroid/ui/chat/ChatActivity.kt

...eldroid/util/deceptive_networks/DeceptiveNetworkDialog.kt

app/src/main/res/raw/untrustworthy_network_freenode.html

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

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

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

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

...ku/quasseldroid/viewmodel/helper/EditorViewModelHelper.kt