Global Styles: Dynamic size for dropdown menus

### Problem description

In some cases the dropdown menu is too short to allow users to read all the content and to distinguish the different options. See for example the project selection dropdown menu in the monitoring reports section of the CDM AMS-III.F policy (attached screenshot).

### Requirements

The dropdown menus should show as much information as possible to the users to allow them to make a proper selections.

### Definition of done

The size of those dropdown menu dynamically resize based on the available space, so they can show as much data as possible.

### Acceptance criteria

At least the main dropdown menus (i.e. the project selection mentioned above) are fixed.