UI Component grid indicates a wrong number of selections when removing keyword search

[hostep]

Preconditions (*)

1. Seen on Magento 2.2.3, 2.3.2 and 2.3, 2.4-develop (7cf99d1), so probably all M2 versions are affected

Steps to reproduce (*)

1. Setup some vanilla Magento

2. Login to the backend

3. Create 3 customers: 'One One', 'Two Two' and 'Three Three':
   <img width="486" alt="Screenshot 2019-08-28 at 20 05 17" src="https://user-images.githubusercontent.com/85479/63881267-b98dc500-c9cf-11e9-8669-8dc78cfb98c7.png"]

4. In the 'Search by keyword' box, enter 'one' and search

5. In the first column, choose the 'Select All' option

6. Notice that one record is selected:
   [img width="421" alt="Screenshot 2019-08-28 at 20 06 11" src="https://user-images.githubusercontent.com/85479/63881435-21441000-c9d0-11e9-949c-d2a56c865649.png"]

7. Remove the 'one' keyword search by pressing the 'x' icon to the right of it.

8. Notice that it now says that one record is selected, but visually all records have a checkmark:
   [img width="424" alt="Screenshot 2019-08-28 at 20 06 24" src="https://user-images.githubusercontent.com/85479/63881521-518bae80-c9d0-11e9-819d-794096cd597a.png"]

=> this is probably the main bug, but it gets even worse

1. Select Actions => Delete

2. Notice that it says it will remove 1 record:
   [img width="692" alt="Screenshot 2019-08-28 at 20 06 36" src="https://user-images.githubusercontent.com/85479/63881616-87309780-c9d0-11e9-8a77-b37ebaea6768.png"]

3. Press OK

4. Notice that it now removed all records (3) instead of the 1 it claimed to delete before yikes!
   [img width="441" alt="Screenshot 2019-08-28 at 20 06 47" src="https://user-images.githubusercontent.com/85479/63881704-b6df9f80-c9d0-11e9-99d9-690560719c9e.png">

Note that the exact same thing can be reproduced with the product grid (and maybe other grids as well in Magento).

Expected result (*)

1. After removing the keyword search, it should only keep 1 record selected, not all of them

Actual result (*)

1. Shop owners calling in panic that they unintentionally removed all their customers/products somehow

[m2-assistant]

Hi @hostep. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@hostep do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

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• Join Magento Community Engineering Slack and ask your questions in #github channel.

[m2-assistant]

Hi @shikhamis11. Thank you for working on this issue.
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[shikhamis11]

@magento give me 2.3-develop instance

[magento-engcom-team]

Hi @shikhamis11. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @shikhamis11, here is your Magento instance.
Admin access: https://i-24348-2-3-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[m2-assistant]

Hi @shikhamis11. Thank you for working on this issue.
Looks like this issue is already verified and confirmed. But if you want to validate it one more time, please, go though the following instruction:

• 1. Add/Edit Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 2. Verify that the issue is reproducible on 2.3-develop branch

  Details

  - Add the comment @magento give me 2.3-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.3-develop branch, please, add the label Reproduced on 2.3.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 3. If the issue is not relevant or is not reproducible any more, feel free to close it.

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[magento-engcom-team]

✅ Confirmed by @shikhamis11
Thank you for verifying the issue. Based on the provided information internal tickets MC-19708 were created

Issue Available: @shikhamis11, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.