Small fixes for the demo — Cold Shell Steam update #142415

DEMO patchlist: * bridge boss could attack too fast on some systems, not any more * added an Interference on the map screen in room, when the protagonist is ready to fight - for visibility * tutorial levels now have the "light" correctly connecting the hint button to the skill icon * made the "stop music" levels' exits wider - for a more comfortable mission completion * now some texts under the quest banner will fade a bit, for a better look Thanks to the people who reached out to me and told me about those issues, you are awesome! Also, those fixes will be included to the full version.