Knowledge UI (#779)

* knowledge button in HUD

* ui controller

* bugfixes

* finish

* all-knowing ghosts

* Create knowledge-ui.ftl

Content.Client/UserInterface/Systems/MenuBar/Widgets/GameTopMenuBar.xaml

@@ -33,6 +33,18 @@
         HorizontalExpand="True"
         AppendStyleClass="{x:Static style:StyleBase.ButtonSquare}"
         />
+    <!-- CP14 UI part -->
+    <ui:MenuButton
+        Name="CP14KnowledgeButton"
+        Access="Internal"
+        Icon="{xe:Tex '/Textures/Interface/students-cap.svg.192dpi.png'}"
+        ToolTip="{Loc 'cp14-game-hud-open-knowledge-menu-button-tooltip'}"
+        BoundKey = "{x:Static is:ContentKeyFunctions.CP14OpenKnowledgeMenu}"
+        MinSize="42 64"
+        HorizontalExpand="True"
+        AppendStyleClass="{x:Static style:StyleBase.ButtonSquare}"
+    />
+    <!-- CP14 UI part end -->
     <ui:MenuButton
         Name="CharacterButton"
         Access="Internal"