vim-patch:9.1.0186: cursor pos wrong on mouse click after eol with 'rl', 've' and conceal (#27903)

Problem:  Wrong cursor position when clicking after end of line with
          'rightleft', 'virtualedit' and conceal.
Solution: Set values in ScreenCols[] also with SLF_RIGHTLEFT.  Also fix
          off-by-one cursor position with 'colorcolumn' (zeertzjq).

closes: vim/vim#14218

deb2204bff

src/nvim/drawline.c

@@ -2621,12 +2621,11 @@ int win_line(win_T *wp, linenr_T lnum, int startrow, int endrow, int col_rows, s
           // linebuf_vcol[] already filled by the for loop above
           wlv.off++;
           wlv.col++;
+          wlv.vcol++;
 
-          if (vcol_hlc(wlv) >= rightmost_vcol) {
+          if (vcol_hlc(wlv) > rightmost_vcol) {
             break;
           }
-
-          wlv.vcol++;
         }
       }