Various fixes

• 1. MbTable, MbTableList & NavLinks should have the same bg-color on hover.
• 1. Move Table Actions to MbPopupProxy to keep the logic the same as overlays.
• 1. Remove rounded from MbTable and MbTableList as it is not working together with lines.
• 1. Remove Assets headline from assets pages as it is already in the Toolbar.
• 1. Projects Page add Timeline/Grid dialog has no headline.
• 1. MbTable and MbTableList more-buttons should have the same Style. #627 (closed)