Improve accessibility

.../quasseldroid/ui/chat/buffers/BufferViewConfigFragment.kt

...de/kuschku/quasseldroid/ui/chat/input/ChatlineFragment.kt

...chku/quasseldroid/ui/clientsettings/crash/CrashAdapter.kt

...hku/quasseldroid/ui/clientsettings/crash/CrashFragment.kt

...i/clientsettings/whitelist/WhitelistCertificateAdapter.kt

...d/ui/clientsettings/whitelist/WhitelistHostnameAdapter.kt

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

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

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

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

...ain/res/layout/preferences_whitelist_certificate_item.xml

...c/main/res/layout/preferences_whitelist_hostname_item.xml

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

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