bug: Messages SMS Zone Combobox width

[ophthal]

Describe the bug

IN /interface/main/messages.php

<span class="select2-selection select2-selection--single" role="combobox" aria-haspopup="true" aria-expanded="true" tabindex="0" aria-disabled="false" aria-labelledby="select2-SMS_patient-container" aria-owns="select2-SMS_patient-results"><span class="select2-selection__rendered" id="select2-SMS_patient-container" role="textbox" aria-readonly="true"></span><span class="" role="presentation"><b role="presentation"></b></span></span>

To Reproduce

This SMSM Box is only visible to MedEx users so here is a screen shot of how it appears in the OpenEMR Docker:latest

Expected behavior

need to add width:200px or something else to expand this "combobox" so it is visible.
I am not sure which class or css file can handle this but somewhere width:200px would work.

[robertdown]

Just a note, we can't hard code a width in like this, it will break responsiveness.

[sjpadgett]

Need to give a default item to populate select.
Also for some ideas on config for select2 take a look at some ways I've implemented like in: portal/import_template_ui.php throughout.