Use Qt style "Windows", remove optional dependency on qtstyleplugins

Add explicit custom scroll bar style

Implement external events approach to input user actions into engine. Doesn't work for some obscure reason ("Error: Unknown method parameter type: LongEventType")

Don't save "!MULTI" pseudo-key into team files

Fix crash when pressing key bind reset button in settings

sdlkeys.cpp: Remove keys without physical representation

Frontend: Make "missing key name" warning more generic

Match key names in sdlkeys with SDL-pretty printed names (for localization)

Frontend: Fix wrong keyboard key names being displayed with regard to keyboard layout

don't redirect to self

Show key combinations in controls config menu (read-only)

Add support for 4th and 5th mouse button

Move Hedgewars key IDs to CSV file

Make key ID generation algorithm more useful

Fix some minor problems with new frontend code

Limit room name change rate

Merge

Prevent entering “/”, “\” and “:” in team and scheme names. The name of teams and schems is saved in the file name itself, so these characters would cause trouble as they are used in path names in Linux and Windows.

accept redirect messages

Escape HTML chars in stats screen

Frontend: Force plain text mode for many message windows

add redirect message

Merge alfadur's Opus commit and more

Fix some Qt<->SDL key mappings

Add lookup table for Hedgewars key IDs instead of generating IDs on the fly This makes sure the key IDs never change. Previous implementation abused SDL_GetScancodeName to generate the IDs programmatically, which was not reliable and explicitly adviced against in the SDL documentation <https://wiki.libsdl.org/SDL_GetScancodeName#Remarks>.

enable sdl_mixer opus support if possible

allow running plaintext and tls servers in parallel

Change init theme to Nature

Change theme to Nature if changing from background-only or hidden theme to a generated map type

Change color of fallback border/land texture in Planes theme to brown