fix: callback on mount when should show on mount

[orrgottlieb]

Go over this checklist before submitting your Pull Request

Description: ADD YOUR PR DESCRIPTION HERE

STEP 1: Fulfill the description of the PR above

STEP 2: Select one of 2 main scenarios of adding the new component or editing the existing one

STEP 3: Delete checklist which you don't need

STEP 4: Go over the checklist. All checkboxes should be marked

STEP 5: Delete this instruction

STEP 6: Happy code review and merge!

Adding new component

Basic

• Used plop (npm run plop) to create a new component. This command will create a folder for your component and will update index.js file
• PR has description
• New component is functional and using React Hooks.
• New React Hooks were added to /src/hooks folder (optional)
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Style

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Storybook

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Tests

• Tests are compliant with TESTING_README.md instructions

Updating existing component

Basic

• PR has description
• Changes to the component are backward compatible (including selectors structure). If not - add to the title of the PR "BREAKABLE_CHANGE""
• All changes to the component are reflected in the ReadMe
• If component is old and was not compliant with the latest guidelines - it was fixed (optional)

Style

• CSS selectors are named using BEM convention
• Design is compatible with Monday Design System

Storybook

• All the changes to the component should be reflected in the Storybook.
• Component passed Accessibility Plugin checks

Tests

• All current tests are passing
• New functionality is covered with tests
• Tests are compliant with TESTING_README.md instructions