Remove top margin of community panel container

This is a simpler fix for the scrollbar problem than changing the definition
for height, which was my previous attempt at solving this problem.
Additionally, the top and bottom margins are now consistent.

Signed-off-by: Jonas Schürmann <jonasschuermann@aol.de>

res/css/structures/_TagPanel.scss

@@ -63,9 +63,8 @@ limitations under the License.
     display: flex;
     flex-direction: column;
     align-items: center;
-    margin-top: 5px;
 
-    height: calc(100% - 5px);
+    height: 100%;
 }
 .mx_TagPanel .mx_TagPanel_tagTileContainer > div {
     height: 40px;