Auto stretch to a window size

Currently when the program is opened on a full screen there are plenty of empty area around. It would be nice (and also better for my old eyes) to stretch the widgets so it would fill all available area. Could you add this in one of the future releases?

Also adding font size in preference would be nice.

Start by locating the main window and widget-layout entry points, then inspect how the application handles its preferences. Reproduce the excess space on a full-screen window and determine the intended behavior for stretching widgets and changing font size; done means both requested settings work without disrupting the weather view.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.