it's actually more correct to un-mark-delete by *un*tracking; the sta…

…te is one of tracking absence

DESIGN.md

@@ -52,11 +52,11 @@ local branch and the tracked remote branches with which it is currently synced a
 a single UI object. Remote branches are displayed separately if they're unsynced, untracked or absent.
 
 Consequently, the commands available for a branch as displayed in the UI have polymorphic effect:
-1) "Track": Applies to any remote branch that is not unsynced (and therefore already tracked); 
-    in the CLI-only "tracking ref absent" state, this will effectively cancel its pending deletion. 
+1) "Track": Applies to any remote branch that is not already tracked. 
 2) "Untrack": 
     - For a *tracking local/combined branch*, untracks all remotes.
     - For an *unsynced remote branch*, untracks one remote.
+    - For a *deleting remote branch*, clears the pending delete (it was tracking absence).
 3) "Push": Applies to local branches tracking any remotes. 
 4) "Push to remote...": Applies to local branches when any remotes exist.
 5) "Fetch": Downloads for a specific branch only. 

src-tauri/src/menu.rs

@@ -344,9 +344,6 @@ pub fn handle_context(window: Window, ctx: Operand) -> Result<()> {
                     StoreRef::RemoteBranch {
                         is_tracked: false,
                         ..
-                    } | StoreRef::RemoteBranch {
-                        is_absent: true,
-                        ..
                     }
                 ),
             )?;
@@ -364,8 +361,7 @@ pub fn handle_context(window: Window, ctx: Operand) -> Result<()> {
                     r#ref,
                     StoreRef::RemoteBranch {
                         is_synced: false, // we can *see* the remote ref, and
-                        is_tracked: true, // it has a local, and
-                        is_absent: false, // that local is somewhere else
+                        is_tracked: true, // it has a local (regardless of absence)
                         ..
                     }
                 ),