Maddening 'bug' - new window open instead of new tab when creating a New Score

Upon opening a New Score a new window opens. Well we all know that by now. Argh. Plllleeease give the option to open a new score as a tab with the same loaded stuff as the first open score. Let's don't make musescore into a bloated mess with unnecessary and aggravating 'features'. Ever many thanks!!