Added login warning in home tab if user is not logged in

public/index.html

@@ -264,8 +264,12 @@
 
 						<div id="home_tab" class="main_tabcontent">
 							<h1>Welcome to deemix</h1>
+							<div id="home_not_logged_in">
+								<p>You need to log into your deezer account before starting downloading.</p>
+								<button type="button" name="button" @click="openSettings">Open Settings</button>
+							</div>
 							<div v-if="playlists.length">
-								<h2>Recommended playlists</h2>
+								<h2>Popular playlists</h2>
 								<div class="release_grid">
 									<div v-for="release in playlists" class="release clickable" @click="playlistView"
 										:data-id="release.id">