Fix random failure in test cypress blocks-table.js

[wesleybl]

Added { timeout: 15000 } to all view-mode assertions after save.

Fix error:

  1) Table Block Tests
       Add table block:
     AssertionError: Timed out retrying after 4000ms: expected '<th.left.aligned.middle.aligned>' to contain 'column 1 / row 1'
      at Context.eval (webpack://@plone/volto/./cypress/tests/core/blocks/blocks-table.js:77:60)

See: https://github.com/plone/volto/actions/runs/27320633041/job/80710719698?pr=8325#step:4:714

[Wagner3UB]

@wesleybl I had this problem and fixed it in my last PR https://github.com/plone/volto/pull/8321/changes. It was because the CI here runs headless and the test was too fast. When the test tried to select the first cell, it accidentally glitched out due to a Slate behavior and exited the table without writing the text.

If you want to bring the change over here to keep it separate, we can do that, and then I will pull it into my branch as soon as we merge.

[Wagner3UB]

and our solutions are different, btw: #8321.

[wesleybl]

@Wagner3UB Your solution is more complete. Could you please submit a PR to move it to the main branch? I'll close this one.