Bootstrap-vue: b-table works incorrect with 'sortable: false' fields.

[mr0j]

Describe the bug

User can click on column header with 'sortable: false' or on column header, for which sortable was not specified at all and table sorting will be changed.

Steps to reproduce the bug

1. Go to https://jsfiddle.net/zmvq4dx3/
2. Click on Id column two times to have descending sorting by Id column header. Then click on "First Name" (which has sortable: false) or "Last Name" (for which sortable was not specified at all) column header
3. Grid will be sorted not by Id descending

Expected behavior

Grid sorting should be not changed, click on non sortable column header should be ignored.

Versions

Libraries:

• BootstrapVue: 2.0.0-rc.28

Demo link

https://jsfiddle.net/zmvq4dx3/

Additional context

If something not clear, please, let me know.

[tmorehouse]

Clicking on a non-sortable column will clear any active sort:

https://bootstrap-vue.js.org/docs/components/table#sorting

As mentioned in the Fields section above, you can make columns sortable. Clicking on a sortable column header will sort the column in ascending direction (smallest first), while clicking on it again will switch the direction of sorting. Clicking on a non-sortable column will clear the sorting. The prop no-sort-reset can be used to disable this feature.