Changes/Fixes to Channels/Hotkeys/Inventory Slots.

- Fixed issue with opening multiple instances of the same message channels (will focus the channel if already exists).
- Added tooltip to the 'Clear message window' button.
- Added keyboard Up/Down press for hotkeys.
- Added inventory slots/images.
- Started on adding soul

modules/game_console/console.otui

@@ -75,6 +75,7 @@ Panel
 
   TabButton
     id: clearChannelButton
+    !tooltip: tr('Clear current message window')
     icon: icons/clearchannel.png
     anchors.right: next.left
     anchors.top: parent.top