Misc. imorvements as discussed in RW/KB worksho

* preparation for a context menu to send text messages from ATC/aircraft view
* preparation for context menu for fast pos. updates
* reverse ICAO lookup at login screen
* display fast updates / parts in GUI
* moved max- aircraft into settings
* made serverselection own component

src/blackgui/components/textmessagecomponent.cpp

@@ -42,7 +42,6 @@ namespace BlackGui
             this->ui->le_textMessages->setVisible(false);
             connect(this->ui->le_textMessages, &QLineEdit::returnPressed, this, &CTextMessageComponent::ps_textMessageEntered);
 
-            this->ui->tvp_TextMessagesAll->rowsResizeModeToContent();
             this->ui->tvp_TextMessagesAll->setResizeMode(CTextMessageView::ResizingAuto);
         }