Time profile form: make timezone select drop up (instead of drop down)

[mzazrivec]

The selectbox being at the bottom of the page, there's not enough space for a dropdown select.

Before:

After:

[miq-bot]

Checked commit mzazrivec@17e34bd with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 1 offense detected

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• 💣 💥 🔥 🚒 - Linter/Haml - Linter::Haml STDERR:

warning: parser/current is loading parser/ruby23, which recognizes
warning: 2.3.6-compliant syntax, but you are running 2.3.3.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.