fix: improve the style of edit's input (#838)

Author: mortalYoung

src/components/collapse/style.scss

@@ -3,6 +3,8 @@
 $collapse__extra: #{$collapse}__extra;
 $split_pane_visible: #{$split}__pane__item--visible;
 
+$header-size: 26px;
+
 #{$collapse} {
     background-color: var(--sideBar-background);
     color: var(--sideBar-foreground);
@@ -44,7 +46,7 @@ $split_pane_visible: #{$split}__pane__item--visible;
         display: flex;
         font-size: 11px;
         font-weight: bold;
-        height: 26px;
+        height: $header-size;
         outline: 1px solid transparent;
         outline-offset: -1px;
         padding: 1px 2px;
@@ -73,9 +75,10 @@ $split_pane_visible: #{$split}__pane__item--visible;
 
     &__content {
         flex: 1;
-        height: calc(100% - 25px);
+        height: calc(100% - $header-size);
         outline: 1px solid transparent;
         outline-offset: -1px;
+        padding: 0 1px;
 
         &:focus {
             outline-color: var(--list-focusOutline);

src/components/tree/style.scss

@@ -27,8 +27,8 @@ $treenode-height: 22px;
         }
 
         &__title {
-            margin-left: 5px;
             overflow: hidden;
+            padding-left: 5px;
             text-overflow: ellipsis;
             white-space: nowrap;
             width: 100%;

src/workbench/sidebar/explore/style.scss

@@ -32,12 +32,11 @@
             border: 1px solid var(--list-focusOutline);
             color: var(--input-foreground);
             font-family: inherit;
-            font-size: 13px;
-            height: 20px;
-            left: 0;
+            font-size: inherit;
+            left: -2px;
             margin: 0;
             outline: none;
-            padding: 0;
+            padding: 2px 1px;
             position: relative;
             width: calc(100% - 2px);