Mouse speed + double click annoyance in Linux

I can compare two builds of Shockolate: WIN32 and Linux 64.
Somehow no problems with WIN32 in this regard, but the Linux 64 version has an annoyance with the mouse control, two things:

1 - Mouse double click is not working comfortably, often the double click is not registered as such. I fixed it by increasing the time window in which the second click can be registered to make for a double click:
src\GameSrc\input.c line 1147:
```
- uiDoubleClickTime = 45;
+ uiDoubleClickTime = 90;
```

2 - Mouse cursor speed (sensitivity?) is more then halved when in the 3D game, compared to the main menu or options menu. I found a way to maintain full cursor speed with the modification below. Setting RelativeMouseMode to False before the check for it. But since I do not know exactly what it implies, I do not dare to call it a proper fix:
src\Libraries\INPUT\Source\sdl_events.c line 692:
```
case SDL_MOUSEMOTION: {
+ SDL_SetRelativeMouseMode(SDL_FALSE); // added line
```