docs: link the four unreleased sidebar entries to their PRs

CHANGELOG.md

@@ -18,6 +18,7 @@ file is the human-readable summary of what changed and why.
   is remembered for next launch.
   **New session** is still one click away in the titlebar while Recents is
   folded.
+  ([#183](https://github.com/quickbeard/codev-code/pull/183))
 
 - **Session rows have a ⋮ menu** — every session in the sidebar's Recents and on
   the **View all** list now carries a vertical three-dot button at its right
@@ -29,6 +30,7 @@ file is the human-readable summary of what changed and why.
   from a row opens the session and its share popover, because the share state
   is not carried by the list. Previously the only way to rename, archive or
   delete was to open the session and use the menu next to its title.
+  ([#179](https://github.com/quickbeard/codev-code/pull/179))
 
 - **The sidebar collapses, and Search opens the recents list** — two buttons join
   the titlebar. The leftmost one hides and restores the sidebar, so a session can
@@ -40,6 +42,7 @@ file is the human-readable summary of what changed and why.
   nothing you already press has changed meaning. **View → Toggle Sidebar** in the
   app menu now works too — it had no effect on this layout, since the command it
   dispatches was only ever registered by the old one.
+  ([#175](https://github.com/quickbeard/codev-code/pull/175))
 
 - **The sidebar is always on screen, and it carries your recent sessions** —
   the Projects list plus Settings and Help used to be a column belonging to the
@@ -52,6 +55,7 @@ file is the human-readable summary of what changed and why.
   never have to scroll to find it. **View all** opens the full recent-sessions
   screen, unchanged from today, now framed by the sidebar. Below a narrow window
   width the sidebar hides and the home screen keeps its previous stacked layout.
+  ([#173](https://github.com/quickbeard/codev-code/pull/173))
 
 ## 1.18.4-8