Ensure to keep special dictionary setting on replaced word

As reported !369 (comment 448260)

Try this with and without this patch:

• Some text (e.g. english) with wrong word and enabled auto spell check
• Select wrong word by double click
• Change dictionary from status bar button to e.g. german
• Move cursor around and watch status bar => looks good
• Right click wrong word, fix it to some (in our example, german) suggestion

Result: Word is now fixed but still wrong marked. Move cursor around and watch status bar => word is no longer "german" marked but english again