I18n: make a few messages translatable

• * Missing Paths * in the Presets menu when no preset exists yet.
• The White Noise entry in the Add Node menu is the only one lacking a "Texture" suffix, which doesn't seem justified since the node itself is already called "White Noise Texture". Rename the entry its name can be extracted and used for the node--and for consistency.
• New object material node names (Principled BSDF, Material Output) come from a preset node tree. The nodes' names need to be translated after creation.
• Extract the "Fallback Tool" pie menu title.
• Translate grease pencil options in the viewport overlay menu.

Ref T102030