Change titlecolour variable to truetitlecolour

The word wide variable actually contains the RGB value, rename this to be distinct from the 4 bit Wimp colour, to make searching easier.
No change to binary, not tagged.

s/Wimp01

@@ -1182,7 +1182,7 @@ trueworkbg      #       4               ; work area background colour
 truescoutcolour #       4               ; scroll bar outer colour
 truescincolour  #       4               ; scroll bar inner colour
 truetitlebg2    #       4               ; title background colour when highlighted for input focus
-titlecolour     #       4               ; independent of input focus status
+truetitlecolour #       4               ; independent of input focus status
    [ TrueSelectionColours
 		#	4		; spare word because of selected icon bg
    ]

s/Wimp02

@@ -8128,7 +8128,7 @@ no_thin_border
         TST     R14, #ws_hasfocus
         LDREQ   R0, truetitlebg
         LDRNE   R0, truetitlebg2
-        STR     R0, titlecolour         ; title backgraound, irrespective of input focus
+        STR     R0, truetitlecolour     ; title backgraound, irrespective of input focus
         BL      window_bg
 
   |
@@ -8212,7 +8212,7 @@ redrawoutlp_done_tracing
         ADDNE   R4,R4,R14,LSR #1        ; r4 -> upper table half (=focus icons)
 
       [ TrueIcon3
-        LDR     R14, titlecolour
+        LDR     R14, truetitlecolour
         LDR     R0, =rgb_lightgrey
         TEQ     R0, R14
         LDREQ   R14, truetitlefg
@@ -8494,7 +8494,7 @@ vscrollfits
 
 novscroll
       [ TrueIcon3
-        LDR     R0, titlecolour
+        LDR     R0,truetitlecolour
       |
         LDRB    R0,titlecolour
       ]

s/Wimp04

@@ -1611,7 +1611,7 @@ drawicon_system
       [ TrueIcon3
         LDR     LR, truetitlefg         ; forcibly reassert title truecolours
         STR     LR, truefgcolour
-        LDR     LR, titlecolour
+        LDR     LR, truetitlecolour
         STR     LR, truebgcolour
       ]
 ;        Pull    "LR"

s/Wimp10

@@ -3181,7 +3181,7 @@ tintfunc Entry "R1-R8"
         TEQEQ   R2, R3
         EXIT    NE                      ; leave colours alone
 
-        LDR     R4, titlecolour
+        LDR     R4, truetitlecolour
         AND     R2, R8, R4, LSR #8      ; title background red component
         AND     R3, R8, R4, LSR #16     ; title background green component
         MOV     R4, R4, LSR #24         ; title background blue component