Роман

## Description Added tutorial for making custom model inherited from ModelBase #101 ## Type of change - [ ] Bug fix (non-breaking change which fixes an issue) - [x] New...

if column.model not provided in visual app then set default model name

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## Description Set default model name in `Column.Model` column, when using `VisualApp` [#118](https://github.com/MobileTeleSystems/RecTools/pull/118) Closes #118 ## Type of change - [ ] Bug fix (non-breaking change which fixes an issue)...