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Improvements:
- Show picture information in outline widget
- Improve linux icon theme integration (icon like code-variable,
code-function will be fetched from icon theme if the theme has theme,
e.g. on plasma 5 with breeze icon theme)
Fixed bugs:
- Fix division/section not correctly recognized in case where the user
added some spaces before the keyword and the period
- Fix auto-indent of file where column 1-6 are not empty