* Added file reload feature to widgets.
* Modify feature name 'reload' to 'refresh' and fixed ignoring button name.
* refresh widget bugfix
* crash patch for "widget" input by type mismatch
* compensate offset on showimage
* adding widget caused misaligned offset
* patch refresh feature for general method
* clean up patch and following upstream
* make more clean code for refresh feature
* move refresh button position
* robust patch for refresh feature
* patch for refreh feature
* avoid specify REFRESH_LIST for each node
* prevent updating selected value unless removed item
* update all combo list for 'required input' in node
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Co-authored-by: Lt.Dr.Data <lt.dr.data@gmail.com>