[FIX] "Read Only" and "Allow Reacting" system messages are missing in rooms

[matheusbsilva137]

Proposed changes (including videos or screenshots)

• Add system message to notify changes on the "Read Only" setting;
• Add system message to notify changes on the "Allow Reacting" setting;
• Fix "Allow Reacting" setting's description (updated from "Only authorized users can write new messages" to "Only authorized users can react to messages").
  

Issue(s)

Task - ClickUp

Steps to test or reproduce

1. Create a new channel (not read-only);
2. Go to Room Information > Edit > Read Only and turn this setting on. Expected Behavior: a system message with the text "Room set as Read Only by your.user" should be sent;
3. Turn the "Read Only" setting off. Expected Behavior: a system message with the text "Room added writing permission by your.user" should be sent;
4. Turn the "Read Only" setting on again and then turn the "Allow Reacting" setting on. Expected Behavior: a system message with the text "Room allowed reacting by matheus.barbosa by your.user" should be sent;
5. Turn the "Allow Reacting" setting off. Expected Behavior: a system message with the text "Room disallowed reacting by your.user" should be sent;
   IMPORTANT: Save the changes after changing each setting (the system messages will only be sent after saving).

Further comments

[lgtm-com]

This pull request fixes 2 alerts when merging c51ee57 into c59d8fd - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging 0b02d6e into 591ca0c - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging a685c83 into d03ee51 - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging 30be105 into 0118745 - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging 7491847 into 0a293e5 - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging 062def1 into e34af8d - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging 5904e97 into e34af8d - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments

[lgtm-com]

This pull request fixes 2 alerts when merging 0bca6d8 into 558bab0 - view on LGTM.com

fixed alerts:

• 2 for Superfluous trailing arguments