A more modern and beautiful main window

Several problems discovered in the current test need to be located and fixed before merging:

[x] Moving windows will flash unstable errors, etc.
[x] Changes in the width of the menu bar cause UI position problems in the title bar
[x] The window size and location information recorded in the setting is invalid.
[x] Full screen invalid
[x] Transparent window setting invalid
[x] The settings window always fails at the front
[x] There is a problem with the display of non-modal subwindows on macos
[x] After macos displays the tab preview for the first time, the main window is abnormal and needs to be refocused.
[x] The input box prompt character color is incorrect and cannot be displayed.
[x] Tab close button cannot be displayed
[x] The scroll bar suggestion becomes thinner and similar to before the change.
[x] The status bar character color is incorrect and cannot be displayed.
[x] Status bar output menu information is invalid
[x] Program exit check invalid
[x] Floating windows can sometimes cause program crashes

The following problems may be within the acceptable range, and it would be better if they can be optimized:

QQxiaoming / quardCRT