feat: improve windows managemet when switching to popup [LW 12347]

[szymonmaslowski]

Checklist

• JIRA - <link>
• Proper tests implemented
• Screenshots added.

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Proposed solution

Improve logic behind management of browser windows during switching to popup mode.

1. Get all windows
2. From all windows, get those that have some 3rd party tabs (windowsWith3rdPartyTabs) - they may also have any lace tabs. The preference is to open the popup in a window which does not close after we close all the lace tabs.
3. If windowsWith3rdPartyTabs contains the currently focussed one, then it is put in at index 0. (candidateWindowsWithPreferenceForCurrentlyFocused) - We prefer to open the popup in a window which is currently foccused. If the list does not contain a currently focussed window, it is fine; we will choose another one. The focussed one will close anyway after we close all lace tabs as it does not have any other tab.
4. We select a window that will be focussed next (nextFocusedWindow) - we take the first one from candidateWindowsWithPreferenceForCurrentlyFocused (which may be the currently focussed one)
5. If nextFocusedWindow is empty, then it means there are no windows with 3rd party tabs open. In this case, we want to choose any of the windows to be focused next and open an empty tab on that window so the window does not close when all its lace tabs get closed.
6. We close all the lace tabs in all windows, no matter how many windows there are. Windows having only lace tabs will close. Those having 3rd party tabs remain open.
7. We open the popup in the window that was nominated to be the next active (a currently active one or any other).

Testing

1. Single window with only lace tab - should close lace, open empty tab and open lace popup
2. Single window with lace and some other tab - should close lace, switch to other tab and open popup
3. Two windows, active one with only lace and background one with some other tab - should close active window and open popup in background window
4. Two windows, active one with lace and some other tab, background one with lace and some other tab - should close all lace tabs in all windows, switch to other tabs in all windows and open popup in active window

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
1 Accepted issue

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[przemyslaw-wlodek]

Great work @szymonmaslowski! 🚀 🫶