Do not steal focus when selecting disputes

This commit reverts a change added in
f0a985e (#1311) that made it impossible
to scroll through arbitration tickets with the arrow keys, because on
selecting each dispute/ticket, the input text area would steal focus
away.

Now, the input text field still gets auto-focused when the dispute view
is opened, but does not try to steal / auto-focus when scrolling through
/ selecting individual disputes.

gui/src/main/java/io/bisq/gui/main/disputes/trader/TraderDisputeView.java

@@ -915,7 +915,6 @@ private void showArrivedIcon() {
             root.getChildren().add(2, messagesAnchorPane);
 
             scrollToBottom();
-            GUIUtil.requestFocus(inputTextArea);
         }
 
         addListenersOnSelectDispute();