New search functionality

I’ve added an option for description search.

This searches for whole words in the module documentation. The results are not shown live, but there is a button next to the search field which can be used to show the search results (it will show the number of modules found).

I’ve added a checkbox for this on the and I’ve also added a right mouse click context menu to the search field which can also be used to set the search options. The new option to search trough the docs is off by default.

Added a couple of buttons to the search screen, one to cancel the search, one to get module help for the selected module (this will open in a browser window) and one to select the selected module in the module selector.