(svn r1350) Replace Vehicle GUI:

- Replaced "WP(w,replaceveh_d).line_height" with 
"w->resize.step_height" since they needed to be the same anyway
- Cleaned the code a litte for readability (like correct tabbing)
- Added company color to replace vehicle windows to make them look like 
the rest of the vehicle windows and made the caption text white (also to 
fit the standard)

 --This line, and those below, will be ignored--

M    vehicle_gui.c
M    lang/english.txt
M    window.h

window.h

@@ -321,7 +321,6 @@ typedef struct {
 	byte sel_index[2];
 	int16 sel_engine[2];
 	uint16 count[2];
-	byte line_height;
 } replaceveh_d;
 
 typedef struct {