gsettings: First attempt at porting to gsettings
gsettings: Fix schema id and path for network gschema.
gsettings: Correct key type and description for org.blueman.sdp gschema.
gsettings: Set a default height.
gsettings: Fix some of my sillyness in efb349f586d228b4f61c7292eea30b1f9e2ebb12