Improve two view pane

src/theme.scss

@@ -1837,17 +1837,21 @@ tag-input {
 
     .file-trees {
         display: flex;
-    }
-
-    .spacer {
-        width: 2px;
-        background-color: #d3d3d3;
-        margin: 0 10px;
+        overflow: hidden;
     }
 
     filetree {
-        // flex-basis: 50%;
         width: 100%;
+
+        &.two-pane {
+            width: 50%;
+
+            &:first-of-type {
+                margin-right: 5px;
+                padding-right: 5px;
+                border-right: 1px solid #d3d3d3;
+            }
+        }
     }
 
     .toolbar {
@@ -1918,12 +1922,13 @@ tag-input {
 
         .table td {
             vertical-align: middle;
+            padding: 0;
         }
     }
 
     .file-list-header {
         th {
-            padding: 2px 8px;
+            padding: 0;
         }
     }
 
@@ -1932,11 +1937,13 @@ tag-input {
     }
 
     .context-menu-action {
-        display: none;
+        display: inline-block;
+        visibility: hidden;
     }
 
     tr:hover .context-menu-action {
-        display: inline-block;
+        // display: inline-block;
+        visibility: visible;
     }
 
     tr.entry-selected .context-menu-action {