Modal dialogs: add button to start new TC with settings of current instance

[DrShark]

Currently if to start few TC instances, each new instance will use the settings of first instance, unless in some other instance user have used Save Settings option - then new instances will use that saved configuration.

However, while working with many TC instances, it's possible to set unique settings in some of them, and some instances might have their modal windows, like internal Find Files, opened and working.

While modal window is opened, there is no access to Save Settings, and also sometimes there is no need for user to save them in additional TC instances - user can only do some temporary job in that TC instance, close it after it's done, and then will switch to previously opened main TC instance which settings user will keep by using Save Settings or by closing main TC inance while it is a last one being opened.

However, sometimes there is a need to use additional settings-same copies of such temporary TC instances.
To achive this, I suggest to add internal commad which will start new TC instance with settings of current active one, even if there the settings aren't yet manually saved by user, and to add on modal TC windows/dialogs a small button, with just TC icon on it, which will execute mentioned above internal command.