[Ionic 4] fab-button and ion-fab-button missing attributes functionalities

[aam-antonio]

Bug Report

Ionic Info
Run ionic info from a terminal/cmd prompt and paste the output below.

Ionic:

   ionic (Ionic CLI)          : 4.0.3 (C:\Users\tonik\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.1
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0
   @ionic/schematics-angular  : 1.0.1

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.1.1

System:

   NodeJS : v8.11.1 (C:\Program Files\nodejs\node.exe)
   npm    : 6.3.0
   OS     : Windows 10

Environment:

   ANDROID_HOME : not set

Describe the Bug

1. Edge attribute is not working on ion-fab.

2. Disabled attribute keep allowing the user interact with the ion-fab-button.

Related Code

<ion-fab vertical="top" horizontal="end" edge slot="fixed">
    <ion-fab-button mini disabled>
      <ion-icon name="add"></ion-icon>
    </ion-fab-button>
</ion-fab>

[ionitron-bot]

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