Improve channel and user info, fix a casemapping bug

app/build.gradle.kts

.../quasseldroid/ui/chat/info/channel/ChannelInfoFragment.kt

...uschku/quasseldroid/ui/chat/info/user/UserInfoFragment.kt

.../kuschku/quasseldroid/ui/chat/input/AutoCompleteHelper.kt

...java/de/kuschku/quasseldroid/ui/chat/input/RichToolbar.kt

...e/kuschku/quasseldroid/ui/chat/messages/DisplayMessage.kt

...rc/main/java/de/kuschku/quasseldroid/util/AvatarHelper.kt

...in/java/de/kuschku/quasseldroid/util/helper/ViewHelper.kt

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

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

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

app/src/main/res/values-v17/styles_widgets.xml

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

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