editor: small improvements

[sacr1ficez]

• Replaced loops.
• Replaced event sources.
• Localized LOD_Map table (it is not used anywhere else).
• Replaced semicolons with commas.
• Improved readability.

I did small test, but would be nice if someone could test it accurately.

[stoneage-mta]

Hey, thanks for this PR :D

I think we must keep the event attachments in resourceRoot, or the events will be triggered by other map resources...

Imagine this scenario: you have 10 resource maps (map1, map2, ..., map10). When the resource map1 starts, it will call the server-side event requestLODsClient of each map resource below the root element (this case: map2, map3, ..., map10), and they will return the content of the tables usedLODModels to all the other maps via the client-side event setLODsClient, and all they will all apply engineSetModelLODDistance, whereas in this case we just need to sync it once and within the same resource.

[sacr1ficez]

@iDannz1 yeah good point, i forgot that people could use multiple map resources, i'm used to small resources count.

[jlillis]

Looks good and appears to work, although I don't have many maps to test with. Perhaps someone with more editor/mapping experience could check this out?