Attribute button for PV- and shadow-value added

public/main.html

@@ -260,7 +260,24 @@
 
 					</div>
 				</div>
-				<!--Chartbutton-->
+				<!--Attributbutton-->
+				<button class="dropdown-btn">Attributes<i class="fa fa-caret-down"></i></button>
+				<div id="filterswitches" class="dropdown-container">
+				<div class="dropp">
+					<div class="dropp-header">
+					  <a href="#" class="dropp-header__btn js-dropp-action">				  
+						<i class="icon"></i>				  
+					  </a> 				  
+					</div>				  
+					<div class="dropp-body">				  
+					  <label for="pvPotential">PV-Value				  
+						<input type="radio" id="pvPotential" name="dropp" value="PV-Value">				  
+					  </label>
+					  <label for="shadowData">Shadow-Value				  
+						<input type="radio" id="shadowData" name="dropp" value="Shadow-Value">				  
+					  </label>				  
+					</div>
+				  </div>
 				<div id="chartButton" class="button">
 					<div class='lang' key='chart'>Chart</div>
 				</div>