FormGoToCommit: fix "combobox drop down disappears right when loading is complete" by loading data at dialog startup
FormGoToCommit: hit Enter on autocomplete list triggers Go event
FormGoToCommit: fix "jumps always to tag if tag and branch name are the same"
FormGoToCommit: prefill commit expression textbox from clipboard if contains valid data
Merge branch 'feature_diff_goto_filetree_fix' into fix_formgotocommit_dropdown
FormGoToCommit: call revparse as late as possible
FormGoToCommit: SetCommitExpressionFromClipboard: don't call revparse
SetCommitExpressionFromClipboard: reenable revparse
Merge branch 'master' into fix_formgotocommit_dropdown
FormGoToCommit: remove code that selects combobox text after load
Merge pull request #1849 from feinstaub/fix_formgotocommit_dropdown

FormGoToCommit: misc fixes and improvements