[Icon|Button] Make action available on icon and use keyb name.

You can now bind a key-binding on mouse click to icons and buttons by setting
"action" property.

For example:

```css
icon-paste {
    expand: false;
    filename: "gtk-paste";
    size: 24;
    vertical-align: 0.5;
    action: "kb-primary-paste";
}
```

1 files changed, 3 insertions, 4 deletions

diff --git a/doc/rofi-theme.5.markdown b/doc/rofi-theme.5.markdown
index 1da09bb6..a0170665 100644
--- a/doc/rofi-theme.5.markdown
+++ b/doc/rofi-theme.5.markdown
@@ -848,13 +848,12 @@ There are several special widgets that can be used by prefixing the name of the
   This is a textbox widget. The displayed string can be set with `str`.
 * `icon`:
   This is an icon widget. The displayed icon can be set with `filename` and size with `size`.
+  If the property `action` is set, it acts as a button.
+  `action` can be set to a keybinding name and completes that action. (see rofi -show keys for a list).
 * `button`:
  This is a textbox widget that can have a 'clickable' action.
  The `action` can be set to:
- `ok` accept entry.
- `custom` accept custom input.
- `ok|alternate`: accept entry and launch alternate action (for run launch in terminal).
- `custom|alternate`: accept custom input and launch alternate action.
+ `keybinding`: accepts a keybinging name and completes that action. (see rofi -show keys for a list).
 
 To specify children, set the `children`
 property (this always happens on the `box` child, see example below):