fix(layout): Fix dropdwon breaking in some cases

In my particular case, this was the solution to my issue, some JS from bootstrap was actually
grabbing the href and using it as a selector, in these cases `javascript:void(0)` was being passed
as the selector quickly causing an error on the template that resulted in the dropdown not
appearing.

#25

Author: EduardoRT

src/tabler-stubs/views/layouts/app.blade.php

@@ -104,15 +104,15 @@ class="header-brand-img"
                                     </a>
                                 </li>
                                 <li class="nav-item">
-                                    <a href="javascript:void(0)" class="nav-link" data-toggle="dropdown"><i class="fe fe-box"></i> Interface</a>
+                                    <a class="nav-link" data-toggle="dropdown"><i class="fe fe-box"></i> Interface</a>
                                     <div class="dropdown-menu dropdown-menu-arrow">
                                     <a href="#" class="dropdown-item ">Cards design</a>
                                     <a href="#" class="dropdown-item ">Charts</a>
                                     <a href="#" class="dropdown-item ">Pricing cards</a>
                                     </div>
                                 </li>
                                 <li class="nav-item dropdown">
-                                    <a href="javascript:void(0)" class="nav-link" data-toggle="dropdown"><i class="fe fe-calendar"></i> Components</a>
+                                    <a class="nav-link" data-toggle="dropdown"><i class="fe fe-calendar"></i> Components</a>
                                     <div class="dropdown-menu dropdown-menu-arrow">
                                     <a href="#" class="dropdown-item ">Maps</a>
                                     <a href="#" class="dropdown-item ">Icons</a>
@@ -121,7 +121,7 @@ class="header-brand-img"
                                     </div>
                                 </li>
                                 <li class="nav-item dropdown">
-                                    <a href="javascript:void(0)" class="nav-link" data-toggle="dropdown"><i class="fe fe-file"></i> Pages</a>
+                                    <a class="nav-link" data-toggle="dropdown"><i class="fe fe-file"></i> Pages</a>
                                     <div class="dropdown-menu dropdown-menu-arrow">
                                     <a href="#" class="dropdown-item active">Profile</a>
                                     <a href="#" class="dropdown-item ">Login</a>