other tools zoom on plus and equals. hence, we go back to doing so, too

src/main.rs

@@ -46,7 +46,7 @@ fn map_key(egui_key: egui::Key) -> Option<rvlib::KeyCode> {
         egui::Key::Num7 => Some(rvlib::KeyCode::Key7),
         egui::Key::Num8 => Some(rvlib::KeyCode::Key8),
         egui::Key::Num9 => Some(rvlib::KeyCode::Key9),
-        egui::Key::Plus => Some(rvlib::KeyCode::Plus),
+        egui::Key::Plus | egui::Key::Equals => Some(rvlib::KeyCode::PlusEquals),
         egui::Key::Minus => Some(rvlib::KeyCode::Minus),
         egui::Key::Delete => Some(rvlib::KeyCode::Delete),
         egui::Key::Backspace => Some(rvlib::KeyCode::Back),

src/rvlib/events.rs

@@ -84,7 +84,7 @@ pub enum KeyCode {
     Key7,
     Key8,
     Key9,
-    Plus,
+    PlusEquals,
     Minus,
     Delete,
     Back,

src/rvlib/tools/always_active_zoom.rs

@@ -51,7 +51,7 @@ impl AlwaysActiveZoom {
         if events.held_ctrl() {
             let zb = if events.released(KeyCode::Key0) {
                 None
-            } else if events.released(KeyCode::Plus) {
+            } else if events.released(KeyCode::PlusEquals) {
                 zoom_box_mouse_wheel(*world.zoom_box(), world.shape_orig(), 1.0)
             } else if events.released(KeyCode::Minus) {
                 zoom_box_mouse_wheel(*world.zoom_box(), world.shape_orig(), -1.0)
@@ -79,7 +79,7 @@ impl Manipulate for AlwaysActiveZoom {
                 (pressed, KeyCode::MouseLeft, mouse_pressed),
                 (held, KeyCode::MouseLeft, mouse_held),
                 (released, KeyCode::Key0, key_released),
-                (released, KeyCode::Plus, key_released), // Plus is equals
+                (released, KeyCode::PlusEquals, key_released), // Plus is equals
                 (released, KeyCode::Minus, key_released)
             ]
         )