Bug 1202260 - Remove the last border in the event-listener popup and unnecessary padding; r=miker

--HG--
extra : commitid : 3CV4AvHL2D4
extra : rebase_source : 41a9b21ba61e14a64faf6a4c646c60f485b54a5c
extra : histedit_source : af77a7d0ff75296926ae4e239800e4bc7835ffc8

devtools/client/themes/inspector.css

@@ -72,6 +72,14 @@
   cursor: pointer;
 }
 
+.event-header:first-child {
+  border-width: 0;
+}
+
+.event-header:not(:first-child) {
+  border-width: 1px 0 0 0;
+}
+
 .event-tooltip-event-type,
 .event-tooltip-filename,
 .event-tooltip-attributes {
@@ -105,8 +113,15 @@
 
 .event-tooltip-content-box {
   display: none;
-  overflow: auto;
+  height: 100px;
+  overflow: hidden;
   -moz-margin-end: 0;
+  border: 1px solid var(--theme-splitter-color);
+  border-width: 1px 0 0 0;
+}
+
+.event-toolbox-content-box iframe {
+  height: 100%;
 }
 
 .event-tooltip-content-box[open] {