Fix upload button rendering on top of text in comment input (#8793)

* Initial plan

* Fix upload button overlapping textarea content

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

Author: Copilot

webviews/activityBarView/index.css

@@ -70,13 +70,11 @@ textarea {
 	outline: none;
 	margin: 0;
 	resize: none;
-	padding-bottom: 28px;
 }
 
 .textarea-wrapper .comment-upload-button {
-	position: absolute;
-	left: 6px;
-	bottom: 4px;
+	align-self: flex-start;
+	margin: 2px 0 4px 4px;
 	border: none;
 	background: none;
 	padding: 4px;

webviews/editorWebview/index.css

@@ -1037,7 +1037,6 @@ textarea {
 	margin: 0;
 	resize: none;
 	padding-right: 40px;
-	padding-bottom: 28px;
 }
 
 .textarea-wrapper .title-action {
@@ -1076,9 +1075,8 @@ textarea {
 }
 
 .textarea-wrapper .comment-upload-button {
-	position: absolute;
-	left: 6px;
-	bottom: 4px;
+	align-self: flex-start;
+	margin: 2px 0 4px 4px;
 	border: none;
 	background: none;
 	padding: 4px;