ui: Fixes and improvements for bookmarks

* moved bookmark buttons behind search bar
* suggest qualified name when creating, file name for files
* fixed bug when updating bookmark category
* changed comment toggle arrow
* changed edit and delete icons
* fixed undo for edge bookmarks
* keep categories always alphabetical regardless of subsorting
* keep category expansion state when opening and closing browser
* removed QtBookmarkBar, moved logic into QtBookmarkView
* added bookmarks Menu with shortcuts
	Ctrl + D: Create Bookmark
	Ctrl + B: Bookmark Manager

bin/app/data/gui/bookmark_view/bookmark_view.css

@@ -49,7 +49,7 @@
 
 #category_name {
 	color: black;
-	font-size: 14px;
+	font-size: 12px;
 	margin-left: 1px;
 }
 
@@ -60,17 +60,24 @@
 	height: 20px;
 }
 
+#edit_button {
+	margin-right: 3px;
+}
+
 /* Bookmark */
 
 #bookmark {
-	padding: 3px 10px 3px 23px;
+	padding: 3px 10px 3px 3px;
+	margin: 0;
 	background: white;
 	border-bottom: 1px solid #DFDFDF;
 }
 
 #bookmark_comment {
 	font-size: 12px;
-	margin: 3px 0px 3px 26px;
+	padding: 3px 6px 3px 7px;
+	margin: 0;
+	color: #707070;
 }
 
 #activate_button {
@@ -78,7 +85,7 @@
 	border: 2px solid white;
 	border-radius: 8px;
 	color: black;
-	font-size: 14px;
+	font-size: 12px;
 	padding: 4px 8px 3px;
 	text-align: right;
 }
@@ -87,10 +94,14 @@
 	border-color: #2D3C86;
 }
 
+#activate_button:pressed {
+	background: #CDD4F7;
+}
+
 #date_label {
-	margin: 3px 5px 0px;
+	margin: 1px 5px 0px;
 	font-size: 12px;
-	color: gray;
+	color: #707070;
 }
 
 /* Search bar buttons */