Option to Enable/Disable App-Wide Keyboard Navigation

Please let us choose whether to enable or disable the recently-introduced accessibility features. The most annoying part right now is when wanting to quickly scroll up or down in a channel, using Home and End will highlight messages. While Page Up and Page Down could be used instead for this purpose, the scrolling will not be as quick this way. Another part which is really annoying is that TAB will highlight objects. It would be highly appreciated if this functionality could be optional.