Insert mode cursor respects 'rightleft' option

When 'rl' is enabled the insert mode cursor is drawn on the right-hand
side of a cell.

src/MacVim/MMBackend.m

@@ -1569,8 +1569,16 @@ static NSString *MMSymlinkWarningString =
     // flushed (e.g. storing the currently selected text would be a bad idea).
     // We take this approach of "pushing" the state to MacVim to avoid having
     // to make synchronous calls from MacVim to Vim in order to get state.
+
+#ifdef FEAT_RIGHTLEFT
+    BOOL rightLeft = curwin->w_p_rl;
+#else
+    BOOL rightLeft = NO;
+#endif
+
     NSDictionary *vimState = [NSDictionary dictionaryWithObjectsAndKeys:
         [[NSFileManager defaultManager] currentDirectoryPath], @"pwd",
+        [NSNumber numberWithBool:rightLeft], @"w_p_rl",
         nil];
 
     [self queueMessage:SetVimStateMsgID data:[vimState dictionaryAsData]];

src/MacVim/MMTextView.m

@@ -469,7 +469,11 @@ enum {
             ipRect.origin.y += ipRect.size.height - frac;
             ipRect.size.height = frac;
         } else if (MMInsertionPointVertical == insertionPointShape) {
+            BOOL rightLeft = [[[[self vimController] vimState]
+                    objectForKey:@"w_p_rl"] boolValue];
             int frac = ([ts cellSize].width* insertionPointFraction + 99)/100;
+            if (rightLeft)
+                ipRect.origin.x += ipRect.size.width - frac;
             ipRect.size.width = frac;
         }