Update Zed UI for 0.2 release

* changes to padding, spacings and borders
* Fix incorrect borders on titlebar and sidebars
* QA pass on all themes, base font size -> 15
* Changed the max size of the file_finder
* Hid file_finder icons
* Modified the size of tab status indicators
* Made the default sidebar size bigger

zed/src/workspace/pane.rs

@@ -216,7 +216,7 @@ impl Pane {
                             Flex::row()
                                 .with_child(
                                     Align::new({
-                                        let diameter = 6.0;
+                                        let diameter = 7.0;
                                         let icon_color = if item.has_conflict(cx) {
                                             Some(style.icon_conflict)
                                         } else if item.is_dirty(cx) {

zed/src/workspace/sidebar.rs

@@ -37,7 +37,7 @@ impl Sidebar {
             side,
             items: Default::default(),
             active_item_ix: None,
-            width: Rc::new(RefCell::new(220.)),
+            width: Rc::new(RefCell::new(260.)),
         }
     }