Aleksander Nicacio da Silva

[FIX] Adjusted livechat fallbacks to take null values into account

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OC-209 This pull request fixes the fallbacks from a few livechat methods to take into account `null` values and fallback to the correct default value instead of breaking the widget.

Chore: SLA policies e2e tests

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## Proposed changes (including videos or screenshots) ## Issue(s) ## Steps to test or reproduce ## Further comments OC-423

[IMPROVE] Added priority field to edit room contextual bar

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## Proposed changes (including videos or screenshots) ## Issue(s) ## Steps to test or reproduce ## Further comments OC-514

[FIX] Added form error validation for duplicated priority name

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## Proposed changes (including videos or screenshots) ## Issue(s) ## Steps to test or reproduce ## Further comments OC-290

feat: added hideGuestAvatar and hideAgentAvatar to Livechat API's setTheme

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## Proposed changes (including videos or screenshots) ## Issue(s) [PROSVC-50](https://rocketchat.atlassian.net/browse/PROSVC-50) ## Steps to test or reproduce ## Further comments [PROSVC-50]: https://rocketchat.atlassian.net/browse/PROSVC-50?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

feat: Livechat theming improvements

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## Proposed changes (including videos or screenshots) ## Issue(s) [PROSVC-51](https://rocketchat.atlassian.net/browse/PROSVC-51) ## Steps to test or reproduce ## Further comments [PROSVC-51]: https://rocketchat.atlassian.net/browse/PROSVC-51?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

feat: added setting and method to control Livechat system messages visibility

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## Proposed changes (including videos or screenshots) ## Issue(s) [PROSVC-49](https://rocketchat.atlassian.net/browse/PROSVC-49) ## Steps to test or reproduce ## Further comments [PROSVC-49]: https://rocketchat.atlassian.net/browse/PROSVC-49?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

feat: VoIP freeswitch UI start call actions

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#### ❗❗DO NOT MERGE BEFORE #33007 ❗❗ ## Proposed changes (including videos or screenshots) This PR adds triggers for enabling/disable voice calling, start 1:1 a voice calls and start calls...

feat: VoIP freeswitch UI admin

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#### ❗❗DO NOT MERGE BEFORE #33093 ❗❗ ## Proposed changes (including videos or screenshots) This PR adds all necessary logic for assignment and unasignment of VoIP extensions in the admin...

feat: VoIP freeswitch UI components

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#### ❗❗DO NOT MERGE BEFORE #33006 ❗❗ ## Proposed changes (including videos or screenshots) This PR implement's all voice call popup states, transfer modal and its subcomponents. #### Incoming ####...