Signal-android: Display "x has left the group" instead of "Left the group" in conversation overview.

[jnns]

I have:

• [x] searched open and closed issues for duplicates
• [x] read https://github.com/WhisperSystems/Signal-Android/wiki/Submitting-useful-bug-reports

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Bug description

When a group member leaves a group the summary window displays Left the group although x has left the group would avoid confusion about whether I was the one leaving the group or another person.

Steps to reproduce

• Open a group with other members
• Have one of the other members leave the group
• Open Signal's the conversation overview (where a list of conversations is seen, along with the latest message in each conversation)

Actual result: The latest message for the group in question is Left the group (ThreadRecord_left_the_group) which in most translations means that the user (you) left the group.
Expected result: x has left the group (ConversationItem_group_action_left) should be displayed instead.

Signal version: 3.25.x – 3.29.1

[nonlinear]

A nice to have: conversations authored by member that quit group appear differently: either faded out, or in italics.

[ianmcderp]

From the code I can tell that the used String resource has been adapted to provide the requested:

<string name="ConversationItem_group_action_left">%1$s has left the group.</string>

Also I cannot reproduce it on Android 7.0, Signal 4.16.9. When a user is leaving a group, the name of the left user is applied to the conversation item template.

[FeuRenard]

This issue is about the conversation list, not in-conversation.

Issue still present in 4.17.2

[automated-signal]

GitHub Issue Cleanup:
See #7598 for more information.