the qtdeclarative5-ubuntu-ui-toolkit-plugin : Depends: libubuntugestures5 (= 1.3.1793+201512231902-staging-0+1.3.1778+16.04.20151217.1~ubuntu15.04.1) indictes that you have the SDK Staging and/or the Tools Development PPAs enabled on your system.
Please remove all packages from all other sources than the SDK PPA.
the qtdeclarative5- ubuntu- ui-toolkit- plugin : Depends: libubuntugestures5 (= 1.3.1793+ 201512231902- staging- 0+1.3.1778+ 16.04.20151217. 1~ubuntu15. 04.1) indictes that you have the SDK Staging and/or the Tools Development PPAs enabled on your system.
Please remove all packages from all other sources than the SDK PPA.