Some docs updates

docs/objects/Menubar/setSpace.md

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+## setSpace
+Sets the background and the foreground of the item which is currently selected
+
+#### Parameters: 
+1. `number` The space you want between the entries
+
+#### Returns:
+1. `object` The object in use
+
+#### Usage:
+* Creates a default menubar with 4 entries and sets the space to 3.
+```lua
+local main = basalt.createFrame()
+local aMenubar = main:addMenubar()
+  :addItem("1. Entry")
+  :addItem("2. Entry",colors.yellow)
+  :addItem("3. Entry",colors.yellow,colors.green)
+  :addItem("4. Entry")
+  :setSpace(3)
+```
+```xml
+<menubar selectionBG="green" selectionFG="red" space="3">
+  <item><text>1. Entry</text></item>
+  <item><text>2. Entry</text><bg>yellow</bg></item>
+  <item><text>2. Entry</text><bg>yellow</bg><fg>green</fg></item>
+</menubar>
+```