[TASK] ADWD-1500, ADWD 1501 Fix drop-down in Firefox and -/+ in editor

Includes small style changes:
- Add icon for import
- Move "report a bug" link to fixed bottom-left, change icon
Merge pull request #164 from subugoe/bugfixes

[TASK] ADWD-1500, ADWD 1501 Fix drop-down in Firefox and -/+ in editor