Updated docs

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docs/objects/Menubar/setScrollable.md

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+## setScrollable
+Makes it possible to scroll while the mouse is over the menubar
+
+#### Parameters: 
+1. `boolean` If the menubar should be scrollable or not
+
+#### Returns:
+1. `object` The object in use
+
+#### Usage:
+* Creates a new menubar and makes it scrollable
+```lua
+local mainFrame = basalt.createFrame()
+local aMenubar = mainFrame:addMenubar():setScrollable(true)
+  :addItem("1. Entry")
+  :addItem("2. Entry")
+  :addItem("3. Entry")
+  :addItem("4. Entry")
+  :addItem("5. Entry")
+  :addItem("6. Entry")
+  :addItem("7. Entry")
+  :addItem("8. Entry")
+  :addItem("9. Entry")
+
+```
+```xml
+<menubar scrollable="true">
+  <item><text>1. Entry</text></item>
+  <item><text>2. Entry</text></item>
+  <item><text>3. Entry</text></item>
+  <item><text>4. Entry</text></item>
+  <item><text>5. Entry</text></item>
+  <item><text>6. Entry</text></item>
+  <item><text>7. Entry</text></item>
+  <item><text>8. Entry</text></item>
+  <item><text>9. Entry</text></item>
+</menubar>
+```