refactor(action-strip): remove hidden after default change

Author: damyanpetev

src/app/menus/action-strip/action-strip-paragraph-menu/action-strip-paragraph-menu.component.html

@@ -10,7 +10,7 @@
         mollis luctus. Morbi lacinia orci augue, sed blandit est ornare placerat. Cras a ante nec mauris euismod aliquam
         vel pulvinar urna. Morbi tincidunt fringilla tortor, at ultricies neque rhoncus ac.
     </p>
-    <igx-action-strip class="my-action-strip" #actionStrip [hidden]="true">
+    <igx-action-strip class="my-action-strip" #actionStrip>
         <div *igxActionStripMenuItem class="menu-button" (click)="alignTextLeft()" igxRipple>
             <igx-icon>format_align_left</igx-icon>
             <span>Left</span>

src/app/menus/action-strip/action-strip-paragraph-styling/action-strip-paragraph-styling.component.html

@@ -10,7 +10,7 @@
         mollis luctus. Morbi lacinia orci augue, sed blandit est ornare placerat. Cras a ante nec mauris euismod aliquam
         vel pulvinar urna. Morbi tincidunt fringilla tortor, at ultricies neque rhoncus ac.
     </p>
-    <igx-action-strip class="my-action-strip" #actionStrip [hidden]="true">
+    <igx-action-strip class="my-action-strip" #actionStrip>
         <button igxButton (click)="textRestore()">
             <igx-icon>restore</igx-icon>
         </button>

src/app/menus/action-strip/action-strip-paragraph/action-strip-paragraph.component.html

@@ -10,7 +10,7 @@
         mollis luctus. Morbi lacinia orci augue, sed blandit est ornare placerat. Cras a ante nec mauris euismod aliquam
         vel pulvinar urna. Morbi tincidunt fringilla tortor, at ultricies neque rhoncus ac.
     </p>
-    <igx-action-strip #actionStrip class="my-action-strip" [hidden]="true">
+    <igx-action-strip #actionStrip class="my-action-strip">
         <igx-buttongroup [selectionMode]="'multi'" class="buttons">
             <button igxButton (click)="makeTextBold()">
                 <igx-icon>format_bold</igx-icon>