keys: Add TOPIC_DESC shortcut using 'i' key to show/hide topic settings.

Hotkeys updated.

Author: srdeotarse

docs/hotkeys.md

@@ -69,6 +69,7 @@
 |Toggle topics in a stream|<kbd>t</kbd>|
 |Mute/unmute Streams|<kbd>m</kbd>|
 |Show/hide stream information & modify settings|<kbd>i</kbd>|
+|Show/hide topic information & modify settings|<kbd>i</kbd>|
 |Show/hide stream members (from stream information)|<kbd>m</kbd>|
 |Copy stream email to clipboard (from stream information)|<kbd>c</kbd>|
 

zulipterminal/config/keys.py

@@ -279,6 +279,11 @@ class KeyBinding(TypedDict):
         'help_text': 'Show/hide stream information & modify settings',
         'key_category': 'stream_list',
     }),
+    ('TOPIC_DESC', {
+        'keys': ['i'],
+        'help_text': 'Show/hide topic information & modify settings',
+        'key_category': 'stream_list',
+    }),
     ('STREAM_MEMBERS', {
         'keys': ['m'],
         'help_text': 'Show/hide stream members (from stream information)',