No longer jiggle sticky mines if using portable portal device This fixes the sticky mine sound playing when using portal gun while any sticky mine is placed on ground. We decided that placed sticky mines can't be teleported.

Lua scripts for engine testing. These scripts are the same as other Lua scripts
in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or
`EndLuaTest(TEST_FAILED)` when the test is completed.