Make the CTRL+F shortcut search the current room's messages

Right now there's not an easy way to quickly bring up message search. If
you press CTRL+F (with the room information sidebar *closed*, for some
reason) that brings up the same dialog as CTRL+K which seems redundant.

I assigned that shortcut to the message search dialog instead, which is
makes much more sense in my opinion. I also made sure its disabled in
spaces or when there's not a room open.

BUG: 487270
FIXED-IN: 25.12.0

src/rooms/ExploreComponent.qml

@@ -46,10 +46,6 @@ RowLayout {
         onClicked: root.search();
         icon.name: "search"
         text: i18nc("@action", "Search Rooms")
-        Shortcut {
-            sequence: "Ctrl+F"
-            onActivated: searchButton.clicked()
-        }
 
         QQC2.ToolTip.visible: hovered
         QQC2.ToolTip.text: text