[Cin] Aesthetic: Icons for SUV theme

I can see some aesthetic problems for the SUV theme. - If you want, I modified the icons about the patchbay (Cin_20200923_a2.png): expandpatch and tumblepatch. - The background of the New Project window (at the bottom) don't mix the OK and Cancel buttons (Cin_20200923_c2_NewProject.png). - Preferences window, Appearance tab (Cin_20200923_d2_PreferencesAppearance.png): the texts "Warnings" and "Flags" are in a wrong place. They should be under the line. If you want you can find the PNGs in the compressed file. Thanks! IgorBeg