feat: [mainwindow] optimized ui of mainWindow

[LiHua000]

reduce width of separator between docks

Log: as title

[github-actions]

Note

[静态代码检查]

• 敏感词检查失败, 检测到1个文件存在敏感词

详情

{
    "src/plugins/core/uicontroller/controller.cpp": [
        {
            "line": "        QDesktopServices::openUrl(QUrl(\"https://github.com/linuxdeepin/deepin-unioncode/issues\"));",
            "line_number": 1197,
            "rule": "S35",
            "reason": "Url link | f8f0d2a7c7"
        },
        {
            "line": "        QDesktopServices::openUrl(QUrl(\"https://uosdn.uniontech.com/#document2?dirid=656d40a9bd766615b0b02e5e\"));",
            "line_number": 1204,
            "rule": "S35",
            "reason": "Url link | f9197a3d4e"
        }
    ]
}

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Kakueeen, LiHua000
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