Use enum to store sidepane type (#1102)

Like that when closing thunar while the disepane was toggled, the original pane can still be kept.

changed milestone to %4.19.0

assigned to @alexxcons

mentioned in issue #1102 (closed)

added 1 commit

• 92929dc5 - style fix

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added 4 commits

• 92929dc5...45ba9640 - 2 commits from branch xfce:master
• f4166c5a - Use enum to store sidepane type (#1102 (closed))
• c7b76772 - style fix

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enabled an automatic merge when the pipeline for c7b76772 succeeds

merged