room-history: Be consistent about compact visual content activation

It was already not possible with the mouse, but there was still a hover
effect, and the key bindings where still working.

data/resources/stylesheet/_room_history.scss

@@ -279,6 +279,12 @@ state-group-row.room-history-row {
     border-radius: vendor.$menu_radius;
   }
 
+  &.compact {
+    > .instructions {
+      padding: 6px;
+    }
+  }
+
   // Copied from .osd button style in https://gitlab.gnome.org/GNOME/libadwaita/-/blob/main/src/stylesheet/widgets/_buttons.scss
   &.has-placeholder {
     > .instructions {
@@ -290,17 +296,19 @@ state-group-row.room-history-row {
       }
     }
 
-    &:hover {
-      > .instructions {
-        color: white;
-        background-color: color-mix(in srgb, black calc(0.85 * 65%), currentColor calc(0.15 * 65%));
+    &:not(.compact) {
+      &:hover {
+        > .instructions {
+          color: white;
+          background-color: color-mix(in srgb, black calc(0.85 * 65%), currentColor calc(0.15 * 65%));
+        }
       }
-    }
 
-    &:active {
-      > .instructions {
-        color: white;
-        background-color: color-mix(in srgb, black calc(0.75 * 65%), currentColor calc(0.25 * 65%));
+      &:active {
+        > .instructions {
+          color: white;
+          background-color: color-mix(in srgb, black calc(0.75 * 65%), currentColor calc(0.25 * 65%));
+        }
       }
     }
   }

src/session/view/content/room_history/message_row/visual_media.rs

@@ -357,7 +357,7 @@ mod imp {
             };
             self.preview_instructions_icon.set_icon_size(icon_size);
 
-            self.update_gesture_click();
+            self.update_activation();
             self.obj().notify_compact();
         }
 
@@ -369,16 +369,16 @@ mod imp {
 
             self.activatable.set(activatable);
 
-            self.update_gesture_click();
+            self.update_activation();
             self.obj().notify_activatable();
         }
 
-        /// Add or remove the click controller given the current state.
-        fn update_gesture_click(&self) {
-            let needs_controller = self.activatable.get() && !self.compact.get();
+        /// Enable or disable the activation of this row for the current state.
+        fn update_activation(&self) {
+            let is_activatable = self.activatable.get() && !self.compact.get();
             let gesture_click = self.gesture_click.upgrade();
 
-            if needs_controller && gesture_click.is_none() {
+            if is_activatable && gesture_click.is_none() {
                 let gesture_click = gtk::GestureClick::new();
 
                 gesture_click.connect_released(clone!(
@@ -395,6 +395,9 @@ mod imp {
                 self.gesture_click.set(None);
                 self.overlay.remove_controller(&gesture_click);
             }
+
+            self.obj()
+                .action_set_enabled("message-visual-media.activate", is_activatable);
         }
 
         /// Set the cache key with the given value.