bug Mat-menu with tooltip

[BoJIbFbI4]

Bug, feature request, or proposal:

Using mat-menu with matTooltip give a wrong result (see screenshot).
It occurs because of focus on first mat-item by default.

What is the expected behavior?

show tooltip only on mouse over the right mat-item.

What is the current behavior?

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

OS: windows 10
"@angular/cli": "^1.6.7",
"@angular/animations": "^5.2.2",
"@angular/cdk": "^5.2.4",
"@angular/common": "~5.2.2",
"@angular/compiler": "^5.2.2",
"@angular/core": "~5.2.2",
"@angular/flex-layout": "^5.0.0-beta.13",
"@angular/forms": "^5.2.2",
"@angular/http": "^5.2.2",
"@angular/material": "^5.2.4",

Is there anything else we should know?

 <button mat-raised-button color="primary" class=" justify-content-end" [disabled]="!exportBtn"
          [matMenuTriggerFor]="sort"> Export
  </button>
  <mat-menu #sort>
    <ng-container *ngFor="let type of TYPES">
      <button mat-menu-item [matMenuTriggerFor]="submenu" role="button" [hidden]="!type.availability"
              *ngIf="type.array.length > 1">
        <i class="material-icons prc">{{type.icon}}</i>{{type.name}}
      </button>
      <button mat-menu-item role="button" [hidden]="!type.availability" *ngIf="type.array.length < 2"
              [matTooltip]='fileName' [matTooltipPosition]='position' (click)="exportImg(type.type)">
        <i class="material-icons prc">{{type.icon}}</i>{{type.name}}
      </button>
      <mat-menu #submenu>
        <ng-container *ngFor="let sub of type.array">
          <button mat-menu-item role="button" (click)="exportImg(type.type)" [matTooltip]='sub.fileName'
                  [matTooltipPosition]="position">
            <i class="material-icons prc">{{type.icon}}</i>{{(sub.fileName.length > 10)? (sub.fileName |
            slice:0:10)+'..':(sub.fileName) }}
          </button>
        </ng-container>
      </mat-menu>
    </ng-container>
    <button mat-menu-item role="button" (click)="downloadCsv()">
      <i class="material-icons prc">file_download</i>CSV
    </button>
    <button mat-menu-item role="button" [hidden]="!jobZipAvailable" (click)="exportZip()"><i
      class="material-icons prc">file_download</i>Full data
    </button>
  </mat-menu>
</mat-toolbar>

[crisbeto]

Should be resolved by #10728.

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