Few enhancement idea

[Gesugao-san]

• ~Add feature to change mod order in saved modpack~ (dup: #38);
• Add feature to delete few mods at once (Shift + LMB to select, Delete);
• Add feature to import mods from save file into modpack;
• Add feature to export ModMyFactory2 modpack (.fmpa, .fmp) into Factorio modpack (.zip with info.json file with dependencies field) (possible dup: #6).

P.S. Thank you @Artentus for this tool.