Tune up theme settings

Used lxappearance(1) to choose the settings

dotfiles/config/gtk-3.0/settings.ini

@@ -3,3 +3,16 @@ gtk-recent-files-enabled=0
 gtk-primary-button-warps-slider=false
 gtk-toolbar-icon-size=GTK_ICON_SIZE_SMALL_TOOLBAR
 #startup-mode=cwd
+gtk-theme-name=Mist
+gtk-icon-theme-name=Adwaita
+gtk-font-name=Sans 10
+gtk-cursor-theme-name=Adwaita
+gtk-cursor-theme-size=0
+gtk-toolbar-style=GTK_TOOLBAR_ICONS
+gtk-button-images=0
+gtk-menu-images=1
+gtk-enable-event-sounds=1
+gtk-enable-input-feedback-sounds=1
+gtk-xft-antialias=1
+gtk-xft-hinting=1
+gtk-xft-hintstyle=hintfull