fix: button arrow fix

Author: PavloNetrebchuk

course/src/main/java/org/openedx/course/presentation/ui/CourseUI.kt

@@ -385,18 +385,28 @@ fun NavigationUnitsButtons(
                     verticalAlignment = Alignment.CenterVertically,
                     horizontalArrangement = Arrangement.Center
                 ) {
+                    if (!isVerticalNavigation) {
+                        Icon(
+                            modifier = Modifier.rotate(-90f),
+                            painter = painterResource(id = coreR.drawable.core_ic_up),
+                            contentDescription = null,
+                            tint = MaterialTheme.appColors.primary
+                        )
+                        Spacer(Modifier.width(8.dp))
+                    }
                     Text(
                         text = stringResource(R.string.course_navigation_prev),
                         color = MaterialTheme.appColors.primary,
                         style = MaterialTheme.appTypography.labelLarge
                     )
-                    Spacer(Modifier.width(8.dp))
-                    Icon(
-                        modifier = Modifier.rotate(if (isVerticalNavigation) 0f else -90f),
-                        painter = painterResource(id = coreR.drawable.core_ic_up),
-                        contentDescription = null,
-                        tint = MaterialTheme.appColors.primary
-                    )
+                    if (isVerticalNavigation) {
+                        Spacer(Modifier.width(8.dp))
+                        Icon(
+                            painter = painterResource(id = coreR.drawable.core_ic_up),
+                            contentDescription = null,
+                            tint = MaterialTheme.appColors.primary
+                        )
+                    }
                 }
             }
             Spacer(Modifier.width(16.dp))