What's the function of the particle も in 「かわいい写真たてもうれしかったけど、…」?


If you look at my translation of the sentence below from a text book (総まとめ N3
読解), I think you will agree that I have guessed the meaning correctly but can
anyone explain the grammar to the first phrase in bold? The particle も seems
to have a wider usage than that given in most books or perhaps there is an
omitted phrase?

> 「 **かわいい写真たてもうれしかった** けれど、それより、 黙ってプレゼントを用意してくれていたことに感激した。」
>
> "I was very happy with the photoframe (?) but more than that, I was touched
> that she prepared a present secretly, without revealing anything."

Context: This was an entry to a young woman's diary, trying to think of a nice
birthday present for her friend.




Let me shamelessly steal the explanation by sawa and an example by Chocolate
to make up a slightly different explanation.

も signifies that there are other things than the thing to which も is attached.
It is sometimes used with けれど or a similar conjunctive, and in this case the
thing to which も is attached is contrasted to something else, which is often
more important than the thing introduced with も.

> かわいい写真たて **も** うれしかったけれど、それより、 黙ってプレゼントを用意してくれていたことに感激した。 Although the cute
> photo frame made me happy, (it was not the only thing that made me happy,
> namely) more importantly, I was moved by the fact that he/she had prepared a
> present without saying a word.
>
> 勉強 **も** 大事だけど、たまには息抜きしなきゃ。 Although studying is important, (it is not the
> only important thing, namely) you have to take a break once in a while.




Let me shamelessly steal the explanation by sawa and an example by Chocolate
to make up a slightly different explanation.

も signifies that there are other things than the thing to which も is attached.
It is sometimes used with けれど or a similar conjunctive, and in this case the
thing to which も is attached is contrasted to something else, which is often
more important than the thing introduced with も.

> かわいい写真たて **も** うれしかったけれど、それより、 黙ってプレゼントを用意してくれていたことに感激した。 Although the cute
> photo frame made me happy, (it was not the only thing that made me happy,
> namely) more importantly, I was moved by the fact that he/she had prepared a
> present without saying a word.
>
> 勉強 **も** 大事だけど、たまには息抜きしなきゃ。 Although studying is important, (it is not the
> only important thing, namely) you have to take a break once in a while.

