add some fixes for GTK+ 3.18

common/gtk-3.0/3.18/.nvmrc

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+stable

common/gtk-3.0/3.18/README

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+This theme uses libsass/gulp to process the sass/*.scss. Never edit any of the .css files manually.
+
+How to edit this theme:
+
+1. Install `nodejs` and `npm`
+
+2. Install `gulp`
+
+    sudo npm install --global gulp
+
+3. Execute the following from the directory containing `gulpfile.js`
+
+    npm install
+
+4. Edit the sass/*.scss files
+
+5. Regenerate the .css files by executing from the directory containing `gulpfile.js`
+
+    gulp

common/gtk-3.0/3.18/assets.txt

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+checkbox-checked
+checkbox-checked-insensitive
+checkbox-unchecked
+checkbox-unchecked-insensitive
+checkbox-mixed
+checkbox-mixed-insensitive
+radio-checked
+radio-checked-insensitive
+radio-unchecked
+radio-unchecked-insensitive
+radio-mixed
+radio-mixed-insensitive
+checkbox-checked-selected
+checkbox-checked-insensitive-selected
+checkbox-unchecked-selected
+checkbox-unchecked-insensitive-selected
+checkbox-mixed-selected
+checkbox-mixed-insensitive-selected
+checkbox-checked-selectionmode
+checkbox-selectionmode
+radio-checked-selected
+radio-checked-insensitive-selected
+radio-unchecked-selected
+radio-unchecked-insensitive-selected
+radio-mixed-selected
+radio-mixed-insensitive-selected
+switch
+switch-active
+switch-insensitive
+switch-active-insensitive
+switch-header
+switch-active-header
+switch-insensitive-header
+switch-active-insensitive-header
+switch-selected
+switch-active-selected
+switch-insensitive-selected
+switch-active-insensitive-selected
+titlebutton-close
+titlebutton-close-backdrop
+titlebutton-close-hover
+titlebutton-close-active
+titlebutton-max
+titlebutton-max-backdrop
+titlebutton-max-hover
+titlebutton-max-active
+titlebutton-min
+titlebutton-min-backdrop
+titlebutton-min-hover
+titlebutton-min-active
+checkbox-checked-dark
+checkbox-checked-insensitive-dark
+checkbox-unchecked-dark
+checkbox-unchecked-insensitive-dark
+checkbox-mixed-dark
+checkbox-mixed-insensitive-dark
+checkbox-checked-selectionmode-dark
+checkbox-selectionmode-dark
+radio-checked-dark
+radio-checked-insensitive-dark
+radio-unchecked-dark
+radio-unchecked-insensitive-dark
+radio-mixed-dark
+radio-mixed-insensitive-dark
+switch-dark
+switch-active-dark
+switch-insensitive-dark
+switch-active-insensitive-dark
+switch-header-dark
+switch-active-header-dark
+switch-insensitive-header-dark
+switch-active-insensitive-header-dark
+titlebutton-close-dark
+titlebutton-close-backdrop-dark
+titlebutton-close-hover-dark
+titlebutton-close-active-dark
+titlebutton-max-dark
+titlebutton-max-backdrop-dark
+titlebutton-max-hover-dark
+titlebutton-max-active-dark
+titlebutton-min-dark
+titlebutton-min-backdrop-dark
+titlebutton-min-hover-dark
+titlebutton-min-active-dark