fix(picker): mark main button as strong

Author: manucorporat

src/components/button/button.ios.scss

@@ -318,5 +318,5 @@ $button-ios-round-border-radius:                    $button-round-border-radius
 // --------------------------------------------------
 
 .button-strong-ios {
-  font-weight: bold;
+  font-weight: 600;
 }

src/components/picker/picker-component.ts

@@ -438,7 +438,7 @@ export class PickerColumnCmp {
     <div class="picker-wrapper">
       <div class="picker-toolbar">
         <div *ngFor="let b of d.buttons" class="picker-toolbar-button" [ngClass]="b.cssRole">
-          <button ion-button (click)="btnClick(b)" [ngClass]="b.cssClass" class="picker-button" clear>
+          <button ion-button (click)="btnClick(b)" [ngClass]="b.cssClass" class="picker-button" clear [strong]="b.strong">
             {{b.text}}
           </button>
         </div>
@@ -500,6 +500,9 @@ export class PickerCmp {
       }
       return button;
     });
+    if (data.buttons.length > 0) {
+      data.buttons[data.buttons.length - 1].strong = true;
+    }
 
     // clean up dat data
     data.columns = data.columns.map(column => {

src/components/toolbar/toolbar.ios.scss

@@ -378,5 +378,5 @@ $navbar-ios-height:                         $toolbar-ios-height !default;
 // --------------------------------------------------
 
 .bar-button-strong-ios {
-  font-weight: bold;
+  font-weight: 600;
 }