- reduced filesize by ~100kb
- splited _mixins into seperate files
- replaced `@extend`'s
- added split css files (core, components, extra-components, ...)
- changed cursor style for .btn.disabled
- enhanced package.json css* scripts

- updated @fortawesome/fontawesome-free to v5.11.2
- updated @sweetalert2/theme-bootstrap-4 to 2.2.1
- updated @ttskch/select2-bootstrap4-theme to v1.3.2
- updated datatables.net to v1.10.20
- updated datatables.net-autofill-bs4 to v2.3.4
- updated datatables.net-bs4 to v1.10.20
- updated datatables.net-buttons-bs4 to v1.6.1
- updated datatables.net-colreorder-bs4 to v1.5.2
- updated datatables.net-fixedcolumns-bs4 to v3.3.0
- updated datatables.net-fixedheader-bs4 to v3.1.6
- updated datatables.net-keytable-bs4 to v2.5.1
- updated datatables.net-rowgroup-bs4 to v1.1.1
- updated datatables.net-rowreorder-bs4 to v1.2.6
- updated datatables.net-scroller-bs4 to v2.0.1
- updated datatables.net-select-bs4 to v1.3.1
- updated flag-icon-css to v3.4.2
- updated flot to v3.2.13
- updated fs-extra to v8.1.0
- updated inputmask to v4.0.9
- updated overlayscrollbars to v1.10.0
- updated pdfmake to v0.1.60
- updated popper.js to v1.16.0
- updated select2 to v4.0.11
- updated sweetalert2 to v8.18.5

fixed content height calculation

Update _select2.scss

The arrow down overrides the clear "x" button.
Removing this padding-right: 0 fix this issue.

added new plugin jquery-validation v1.19.1

enable auto collapse size by 992px as default option

fixed resizing bugs with chartjs in index.html

fixed submenu expand bug