Fix key capture on Firefox (#373)

* Add tabindex attribute to svg-keyboard-key to allow focusing the key in Firefox

* Fix typo in svg-keyboard-key.component onKeyUp method

shared/src/components/svg/keys/svg-keyboard-key/svg-keyboard-key.component.ts

@@ -118,7 +118,7 @@ export class SvgKeyboardKeyComponent implements OnInit, OnChanges, OnDestroy {
     }
 
     @HostListener('keyup', ['$event'])
-    onKeyUpe(e: KeyboardEvent) {
+    onKeyUp(e: KeyboardEvent) {
         if (this.scanCodePressed) {
             e.preventDefault();
             this.scanCodePressed = false;

shared/src/components/svg/module/svg-module.component.html

@@ -7,6 +7,7 @@
             [width]="key.width" [height]="key.height"
             [attr.transform]="'translate(' + key.x + ' ' + key.y + ')'"
             [attr.fill]="key.fill"
+            [attr.tabindex]="0"
             [keyAction]="keyActions[i]"
             [active]="selected && i == selectedKey.keyId"
             [keybindAnimationEnabled]="keybindAnimationEnabled"