Replace `Generate ...` buttons in "Components" and "Functions" sections with menu

[ipselon]

It is required to replace buttons Generate source code for new component and Generate source code for new function list with drop-down menus.

There should be options in the menu. In the "Components" section:

• Generate source code for new component
• Install packages from the market

In the "Functions" section:

• Generate source code for new function list
• Install packages from the market

The option Install packages from the market should open the same dialog when the user clicks on the top-left corner menu and chooses the option Install packages from the market