patch 9.1.0184: Cursor pos wrong when clicking with conceal and wrap

Problem:  Cursor position wrong when clicking with conceal and wrap.
Solution: Use the virtual column of the last char for ScreenCols[] in
          boguscols.  Remove use of MAXCOL in ScreenCols[].  Rename
          third argument of wlv_screen_line() to "clear_end" as that's
          clearer what it does (zeertzjq).

related: 14192
closes: #14200

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/vim.h

@@ -627,6 +627,7 @@ extern int (*dyn_libintl_wputenv)(const wchar_t *envstring);
 // flags for screen_line()
 #define SLF_RIGHTLEFT	1
 #define SLF_POPUP	2
+#define SLF_INC_VCOL	4
 
 #define MB_FILLER_CHAR '<'  // character used when a double-width character
 			    // doesn't fit.