gitk: filter invisible upstream refs from reference list

In refill_reflist, upstream refs are now only included if their
commits are visible in the current view. This prevents display
issues like multiple highlighted branches when clicking entries.

Signed-off-by: Michael Rappazzo <[email protected]>

Author: Michael Rappazzo

gitk

@@ -10332,7 +10332,7 @@ proc refill_reflist {} {
         if {![string match "remotes/*" $n] && [string match $reflistfilter $n]} {
             if {[commitinview $headids($n) $curview]} {
                 lappend localrefs [list $n H]
-                if {[info exists upstreamofref($n)]} {
+                if {[info exists upstreamofref($n)] && [commitinview $headids($upstreamofref($n)) $curview]} {
                     lappend trackedremoterefs [list $upstreamofref($n) R]
                 }
             } else {