Input preferences: some style fixes.

Problems found by running haiku-format and looking at the resulting
files. Manually triaged to keep only the correct changes, currently
haiku-format is making a lot of unwanted changes as well.

Merging the correct changes allows us to see the incorrect ones more
easily and continue working on fixing them.

Input preferences: fix selection of focus mode

- Replace the popup menu with a BOptionPopUp to simplify the code
- Remove an unused menu to select "warp mode"
- The focus mode is not stored in the mouse settings file
(config/settings_Mouse_settings), it is in another file
(config/settings/system/app_server/mouse). This file is not read or
written directly by mouse preferences, but we get the settings by
asking app_server. However, the code to get these was missing in one
place, resulting in these settings not being correctly initialized.

Fixes #16524

Change-Id: Ia1efc235c9d1a5408e3c6abc2526da7a0a639fa4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3796
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

Actually handle more than 3 mouse buttons

The code in input_server was pretty much all set for this, but there was
no way to configure the extra buttons. Add them to the mouse view in
Input preferences (up to 5 buttons are handled now)

Define a new B_MOUSE_BUTTON(n) macro to generate the bitmask for a given
button (numbered from 1).

Change-Id: I9091082277937d89b08464ff474e7bbb5db82401
Reviewed-on: https://review.haiku-os.org/c/haiku/+/180
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Connected Devices: Mouse, Touchpad and Keyboard

-Resolve some issues.
-Added the connected devices code in the main window.
-Replace BUTTON_DEFAULTS and BUTTON_REVERT with kMsgDefaults and kMsgRevert.

Change-Id: I3b0c86fc581056859239df0fbf2c085b8d168136
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1619
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Completed Mouse and Touchppad preferences

Complete working and view of pointing devices(mouse and touchpad).

Resolve some issues.
Added the Jamfile

Change-Id: I4db021cb8c63971e5af60bd254c8b3b588d023e9
Reviewed-on: https://review.haiku-os.org/c/1426
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>