[Fix] Ignore leading/trailing whitespace in cloud save filter list items

[CommandMC]

Some games define cloud save inclusion/exclusion lists like this:

"CloudIncludeList": {
  "type": "STRING",
  "value": "savegames/,config-cloud.cfg,keybindings-*.txt"
},

(example is "Dungeons 3"), others instead use

"CloudIncludeList": {
  "type": "STRING",
  "value": "Saves/, MPSaves/"
},

("Galactic Civilizations III")

I have not confirmed this, but these differing formats suggests the EGL simply ignores leading/trailing whitespace in filter entries. Let's do that as well