hgk: added setting of foreground colour

Added the fgcolor setting read by hgk to change the text colour in the
diff output and the file list. The colours for diff highlighting
remains unchanged.

contrib/hgk

@@ -439,7 +439,7 b' proc makewindow {} {'
     global entries sha1entry sha1string sha1but
     global maincursor textcursor curtextcursor
     global rowctxmenu gaudydiff mergemax
-    global hgvdiff bgcolor
+    global hgvdiff bgcolor fgcolor
 
     menu .bar
     .bar add cascade -label "File" -menu .bar.file
@@ -547,7 +547,7 b' proc makewindow {} {'
     .ctop add .ctop.cdet
     frame .ctop.cdet.left
     set ctext .ctop.cdet.left.ctext
-    text $ctext -bg $bgcolor -state disabled -font $textfont \
+    text $ctext -fg $fgcolor -bg $bgcolor -state disabled -font $textfont \
 	-width $geometry(ctextw) -height $geometry(ctexth) \
 	-yscrollcommand ".ctop.cdet.left.sb set" \
 	-xscrollcommand ".ctop.cdet.left.hb set" -wrap none
@@ -581,7 +581,8 b' proc makewindow {} {'
 
     frame .ctop.cdet.right
     set cflist .ctop.cdet.right.cfiles
-    listbox $cflist -bg $bgcolor -selectmode extended -width $geometry(cflistw) \
+    listbox $cflist -fg $fgcolor -bg $bgcolor \
+        -selectmode extended -width $geometry(cflistw) \
 	-yscrollcommand ".ctop.cdet.right.sb set"
     scrollbar .ctop.cdet.right.sb -command "$cflist yview"
     pack .ctop.cdet.right.sb -side right -fill y
@@ -679,7 +680,7 b' proc click {w} {'
 proc savestuff {w} {
     global canv canv2 canv3 ctext cflist mainfont textfont
     global stuffsaved findmergefiles gaudydiff maxgraphpct
-    global maxwidth authorcolors curidfont bgcolor
+    global maxwidth authorcolors curidfont bgcolor fgcolor
 
     if {$stuffsaved} return
     if {![winfo viewable .]} return
@@ -722,6 +723,9 b' proc savestuff {w} {'
 	puts $f "#"
 	puts $f "set authorcolors {$authorcolors}"
 	puts $f "set bgcolor $bgcolor"
+	puts $f "#"
+	puts $f "# The text color used in the diff and file list view"
+	puts $f "set fgcolor $fgcolor"
 	close $f
 	file rename -force "~/.hgk-new" "~/.hgk"
     }
@@ -3894,6 +3898,10 b' set authorcolors {'
 }
 set bgcolor white
 
+# This color should probably be some system color (provided by tk),
+# but as the bgcolor has always been set to white, I choose to ignore
+set fgcolor black
+
 catch {source ~/.hgk}
 
 if {$curidfont == ""} {  # initialize late based on current mainfont