New: Mass series editor

src/UI/Content/Backgrid/selectall.less

@@ -6,8 +6,7 @@
   Licensed under the MIT @license.
 */
 
-.backgrid {
-  .select-row-cell, .select-all-header-cell {
-    text-align: center;
-  }
+.select-row-cell, .select-all-header-cell {
+  text-align: center;
+  width: 16px;
 }

src/UI/Content/Overrides/messenger.less

@@ -0,0 +1,5 @@
+body.control-panel-visible {
+  ul.messenger.messenger-fixed.messenger-on-bottom {
+    bottom: 95px;
+  }
+}

src/UI/Content/overrides.less

@@ -2,3 +2,4 @@
 @import "Overrides/browser";
 @import "Overrides/bootstrap.toggle-switch";
 @import "Overrides/fullcalendar";
+@import "Overrides/messenger";

src/UI/Content/theme.less

@@ -69,6 +69,12 @@
   color     : white;
 }
 
+.control-panel-visible {
+  #scroll-up {
+    bottom: 100px;
+  }
+}
+
 .label-large {
   padding   : 4px 6px;
   font-size : 16px;
@@ -104,7 +110,7 @@ body {
   }
 }
 
-footer {
+.footer {
   font-size       : 13px;
   font-weight     : lighter;
   padding-top     : 0px;
@@ -192,4 +198,19 @@ footer {
 
 .file-path {
   .mono-space();
+}
+
+.control-panel {
+  .card(#333333);
+
+  color: #f5f5f5;
+  background-color: #333333;
+  margin: 0px;
+  margin-bottom: -100px;
+  position: fixed;
+  left: 0;
+  bottom: 0;
+  width: 100%;
+  height: 55px;
+  opacity: 0;
 }