feat/search-history

[qubisc00]

Hi!,

Some long time ago, I have added a basic search history to your project, cause I needed it, but have never considered to publish the code.

I have added some basic UI, which is not perfect. If you like the solution I would improve the MR so it would be merge ready. I am no gtk/c dev but I tried my best, so feedback is welcome.

How it works:

• History is saved to a .csv file which is located in the home directory.
• It stores the search query and the timestamp so you could sort by both.
• The completion opens when you type something or double click on the search entry.

Whats not working:

• The UI broke the current one, if you click to add a path to the database, the wrong index is called in the preferences settings. (I would renew the UI, but i am also not sure if the history needs its own tab in the notebook, should be discussed)
• Double click does not work on the initial state, you have to type something before. E.g. just type a space, remove it and then you can double click. Not sure why its not working, might be some search entry property, which cannot be overwritten?.
• You need to restart the application if you enable/disable history. But this can be easily fixed.