Support (un)resolving topics

[rsashank]

What does this PR do, and why?

This PR adds support for (un)resolving topics in ZT via TopicInfoView popup menu when topic is highlighted in left_stream_bar and i key is pressed to toggle topic settings.

Changes with respect to completion candidate PR:

• Added support beyond ZFL 183: Before Zulip 7.0 (feature level 183), the realm_community_topic_editing_limit_seconds property was returned by the response. It was removed because it had not been in use since the realm setting move_messages_within_stream_limit_seconds was introduced in feature level 162.

• Changes to tests

• Dropped the first commit

External discussion & connections

• [x] Discussed in #zulip-terminal in Support (un)resolving topics #T1235 (fix #T1075)
• [x] Fully fixes #1075
• [ ] Partially fixes issue #
• [x] Builds upon previous unmerged work in PR #1235
• [ ] Is a follow-up to work in PR #
• [ ] Requires merge of PR #
• [ ] Merge will enable work on #

How did you test this?

• [x] Manually - Behavioral changes
• [x] Manually - Visual changes
• [x] Adapting existing automated tests
• [x] Adding automated tests for new behavior (or missing tests)
• [x] Existing automated tests should already cover this (only a refactor of tested code)

Self-review checklist for each commit

• [x] It is a minimal coherent idea
• [x] It has a commit summary following the documented style (title & body)
• [x] It has a commit summary describing the motivation and reasoning for the change
• [x] It individually passes linting and tests
• [x] It contains test additions for any new behavior
• [x] It flows clearly from a previous branch commit, and/or prepares for the next commit

Visual changes

[rsashank]

@neiljp Thanks for the feedback!

Updated this PR :)