Fix bugs with preset values in lua cvars

1. Any cvar without MIN, MAX would be disallowed; now check that at least one of those values is actually present.
2. Handle value index properly when shifting array.

Restores the ability to set cvars defined in this way to values inbetween MIN and MAX

See !1480 (merged)

added 5 commits

• b975eedd...1355a82a - 4 commits from branch next
• 34449020 - Merge remote-tracking branch 'origin/next' into lua-minmax-plus-bruh-moments

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added Lua label

changed milestone to %2.2.11

removed milestone %2.2.11

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added 2513 commits

• 34449020...ae783f01 - 2512 commits from branch next
• 97e449bd - Merge branch 'master' into lua-minmax-plus-bruh-moments

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approved this merge request

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changed milestone to %2.2.14

added 130 commits

• 97e449bd...6976f852 - 129 commits from branch next
• 41992503 - Merge remote-tracking branch 'origin/next' into lua-minmax-plus-bruh-moments

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changed title from Fix lua-minmax-plus to Fix bugs with preset values in lua cvars

enabled an automatic merge when the pipeline for 41992503 succeeds

merged

mentioned in commit cec5338f