Fix channel prefer dialog not save

Closes #222 (closed)

• The reason that new channel preferences isn't saved because its editing isn't finished if click on Save right after editing. So setFocus is called on save button to finish it.
• Also more condition is checked and correct on create sqls
• To be more descriptive variable idx has been changed to preferred_sohs and database table ChannelPrefer's IDs has been changed to preferredSOHs.

assigned to @ldam

requested review from @kienle

changed title from add more and correct condition to check rows to create sqls; explicitly call... to Fix channel prefer dialog not save

added 3 commits

• eb862acc...ae395df6 - 2 commits from branch master
• 2e05abdd - Merge branch 'master' into i222_channel_prefer_dialog_not_save

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requested review from @kienle

added 1 commit

• 4b5db64e - docstring

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requested review from @kienle

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• 49a31af9 - exclude ‘Default’ from avail_data_types because it only has meaning for...

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requested review from @kienle

added 1 commit

• 78fb2cfa - fix condition for data_type

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resolved all threads

If there is a problem when saving the channel preferences, no error message is shown in the program. Instead, an unrelated exception is raised.

It is a bit awkward that any problem in the channel preferences dialog is shown in the main window.

changed target branch from master to develop

added 1 commit

• 85ee1ba7 - modify channel_prefer_dialog to print error message in the dialog's tracking...

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resolved all threads