Import Notes filter fix and minor Preview updation

Fixes new_notes updation following title or content containing objects
filtration by assigning result from .map() method back ot new_notes to
update the imported data as per the notes data mapping done within it
along with current timestamp selection or assigning a new one via Date
.toLocaleString without 'new' constructor invoking as that resulted in
local date and time string without any data on timezone which mismatched
with existing timestamp strings captured in other parts of creation and
updation of notes. Preview area below file selection under Import Notes
Modal is set to italicize Preview label and use decodeURIComponent to
decode any spacing and special characters back from their %-escape
literals.

Signed-off-by: Harshit Gupta <[email protected]>

src/App.js

@@ -179,12 +179,12 @@ function App() {
 														new_notes = (new_notes === "") ? [] : JSON.parse(new_notes);
 														if (Array.isArray(new_notes) !== true) new_notes = [new_notes];		// Converting individual note into Array of that note to support importing individual note Object as well from reader.result
 
-														new_notes.map( note => (note.title || note.content) && { title:note.title, content:note.content, creation_timestamp: note["timestamp"] ? note.timestamp : note.creation_timestamp ? note.creation_timestamp : new Date().toLocaleString() } );	// Filtering data using the required fields of notes for importing, ensuring that a note is only imported if it holds a title or content data
+														new_notes = new_notes.map( note => (note.title || note.content) && { title:note.title, content:note.content, creation_timestamp: note["timestamp"] ? note.timestamp : ( note.creation_timestamp || Date().toLocaleString() ) } );	// Filtering data using the required fields of notes for importing, ensuring that a note is only imported if it holds a title or content data, with creation_timestamp field either re-used or set
 
 														if (notes_preview) {
 															if (new_notes.length > 0) {
-																notes_preview.innerHTML = "<br/><label>Preview:</label><br/><br/>";
-																new_notes.forEach( note => notes_preview.innerHTML += `<h6>${note.title}</h6><p>${note.content}</p>` );
+																notes_preview.innerHTML = "<label><em>Preview:</em></label><br/><br/>";
+																new_notes.forEach( note => notes_preview.innerHTML += `<h6>${note.title}</h6><p>${decodeURIComponent(note.content)}</p>` );
 															}
 															else notes_preview.innerText = "No notes found. Please try again using another file.";
 														}