Unify icons using multiple variants, remove all unused icons

crates/editor/src/editor.rs

@@ -3827,7 +3827,7 @@ impl Editor {
             enum CodeActions {}
             Some(
                 MouseEventHandler::new::<CodeActions, _>(0, cx, |state, _| {
-                    Svg::new("icons/bolt_8.svg").with_color(
+                    Svg::new("icons/bolt.svg").with_color(
                         style
                             .code_actions
                             .indicator

crates/editor/src/element.rs

@@ -1735,7 +1735,7 @@ impl EditorElement {
                         enum JumpIcon {}
                         MouseEventHandler::new::<JumpIcon, _>((*id).into(), cx, |state, _| {
                             let style = style.jump_icon.style_for(state);
-                            Svg::new("icons/arrow_up_right_8.svg")
+                            Svg::new("icons/arrow_up_right.svg")
                                 .with_color(style.color)
                                 .constrained()
                                 .with_width(style.icon_width)